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{{short description|None}}
This article lists some of the ''']s used by ]''' to refer to its products before their final release. Since many of these releases, particularly those of new versions of ], are of major significance to the ] community, the terms are often widely used in discussions prior to the official release. Microsoft generally does not announce a final name until shortly before the product is finished, although it is usually possible to speculate ("]", for instance, was expected to be "Windows 97", but was delayed).
{{Use mdy dates|date=May 2024}}
'''Microsoft codenames''' are given by ] to products it has in development before these products are given the names by which they appear on store shelves. Many of these products (new versions of ] in particular) are of major significance to the ] community, and so the terms are often widely used in discussions before the official release. Microsoft usually does not announce a final name until shortly before the product is publicly available. It is not uncommon for Microsoft to reuse ]s a few years after a previous usage has been abandoned.


There has been some suggestion that Microsoft may move towards defining the real name of their upcoming products earlier in the product development lifecycle to avoid needing product codenames.<ref>{{cite web | url=http://blogs.seattletimes.com/brierdudley/2006/05/02/fun_with_microsoft_code_names_1/ | title=Fun with Microsoft code names | date=May 2, 2006 | access-date=2006-07-23 | first=Brier | last=Dudley | work=Brier Dudley's blog | publisher=The Seattle Times Company | archive-date=2014-02-24 | archive-url=https://web.archive.org/web/20140224025602/http://blogs.seattletimes.com/brierdudley/2006/05/02/fun_with_microsoft_code_names_1/ | url-status=dead }}</ref>
{|cellpadding="2" style="border: gray solid 1px; border-collapse: collapse; width: auto"

|- style="background: #ececec;"
==Operating systems==

===Windows 3.x and 9x===
{| class="sortable wikitable"
|-
!Codename !Codename
!Preliminary name !Preliminary name
!Final name !Final name
!Notes !Notes
!Ref
|- |-
|Janus
! colspan="4" style="background: #f9f9f9; text-align: left;" | ''Windows family''
|{{N/a}}
|Windows & MS-DOS 5
|Combined bundle of ] and ]. ] is a Roman god usually depicted with two faces, here symbolizing the previously separate Windows and MS-DOS products.
|<ref>Comes v Microsoft. {{Webarchive|url=https://web.archive.org/web/20210113020844/http://antitrust.slated.org/www.iowaconsumercase.org/TP011907.txt |date=2021-01-13 }}</ref>
|-
|Jastro
|{{N/a}}
|Windows & MS-DOS 6
|Combined bundle of ] and ]. ] of Janus and Astro, the codename of MS-DOS 6.
|<ref>Comes v Microsoft. </ref>
|-
|]
|Windows 3.1 Plus
|]
|Windows 3.1 (]) with enhanced networking; designed to work particularly well as a client with the new ].
|<ref>{{cite journal |url=https://books.google.com/books?id=XlEEAAAAMBAJ&pg=PA39 |title=Windows to boost data sharing |journal=] |date=May 18, 1992 |first=Stuart |last=Johnston |volume=14 |issue=20 |page=39}}</ref><ref>{{cite journal |url=https://books.google.com/books?id=kREEAAAAMBAJ&pg=PA2 |title=Early users detail features of Windows pack |journal=] |date=April 27, 1992 |first=Margie |last=Wylie |volume=9 |issue=17 |page=2}}</ref>
|-
|]
|{{N/a}}
|]
|An updated version of Windows for Workgroups 3.1, which introduces ] and network improvements. It also removes the Standard Mode, effectively dropping support for 16-bit x86 processors.
|<ref>{{cite journal |url=https://books.google.com/books?id=nREEAAAAMBAJ&pg=PA4 |title=Reworking Windows for Workgroups |journal=] |date=July 19, 1993 |first=Frederic |last=Paul |volume=10 |issue=29 |page=4}}</ref>
|-
|]
|Windows 4.0, Windows 93, Windows 94
|]
|For codenames of some of the internal components of Windows 95, see "Jaguar", "Cougar", "Panther" and "Stimpy" under {{section link||OS components}}
|<ref name="Windows 95-related">{{cite journal |url=https://books.google.com/books?id=nToEAAAAMBAJ&pg=PA30 |title=Delay of Windows 95 spells relief for many developers |journal=] |date=January 9, 1995 |first=Ilan |last=Greenberg |volume=17 |issue=2 |page=30}}</ref><ref>{{cite web
|url=http://iowa.gotthefacts.org/011607/5000/PX05516.pdf
|title=Chicago Feature Specification
|date=1992-09-30
|access-date=2010-03-02
|archive-date=2017-06-28
|archive-url=https://web.archive.org/web/20170628110747/http://iowa.gotthefacts.org/011607/5000/PX05516.pdf
|url-status=live
}}</ref>
|-
|Detroit
|{{N/A}}
|USB Supplement to Windows 95 OSR2
|Named after ]. A writer for ] suggested that "Detroit" and other Windows 95-era names were answers to the question posed by Microsoft's "]" marketing campaign.
|<ref>{{cite web |url=http://www.maximumpc.com/article/news/microsoft_unveils_official_name_windows_7 |title=Microsoft Unveils the Official Name for "Windows 7" |first=Mark Edward |last=Soper |date=October 14, 2008 |access-date=2009-05-23 |work=Maximum PC |publisher=Future US |archive-date=2015-04-19 |archive-url=https://web.archive.org/web/20150419030040/http://www.maximumpc.com/article/news/microsoft_unveils_official_name_windows_7 |url-status=live }}</ref>
|-
|]
|Windows 96
|{{Dropped}}
|Named after ]. Cancelled upgrade for Windows 95; sometimes referred to in the press as ''Windows 96''. Codename was reused for ] and ] which incorporated many of the technologies planned for Nashville.
|<ref>Comes v. Microsoft. {{Webarchive|url=https://web.archive.org/web/20081204155711/http://antitrust.slated.org/www.iowaconsumercase.org/011607/3000/PX03208.pdf |date=2008-12-04 }}: "Desktop Operating Systems Mission Memo". Microsoft Confidential.</ref><ref>Comes v. Microsoft. {{Webarchive|url=https://web.archive.org/web/20080908072344/http://antitrust.slated.org/www.iowaconsumercase.org/010807/PLEX_5735.pdf |date=2008-09-08 }}. Microsoft Confidential (October 25, 1995).</ref>
|-
|]
|Windows 97
|]
|{{N/A}}
|<ref>{{cite web |url = http://www.windowsitpro.com/article/news2/memphis-windows-98-.aspx |archive-url = https://archive.today/20120919025146/http://www.windowsitpro.com/article/news2/memphis-windows-98-.aspx |url-status = dead |archive-date = 19 September 2012 |title = Memphis: Windows 98? |work = Windows IT Pro |publisher = Penton Media, Inc. |date = 6 June 1997 |access-date = 16 December 2010 |first1 = Paul |last1 = Thurrott |author-link1 = Paul Thurrott }}</ref><ref>United States v. Microsoft Corporation. {{Webarchive|url=https://web.archive.org/web/20220126212257/https://www.justice.gov/sites/default/files/atr/legacy/2006/03/03/202.pdf |date=2022-01-26 }}: "C. Wildfeuer message re 'Memphis IE 4 focus groups report'"</ref>
|-
|]
|{{N/a}}
|]
|''ME'' stands for ''Millennium Edition''; Microsoft states that it is pronounced ''Me''.
|<ref>{{cite web |url=http://news.cnet.com/Microsoft-names-new-consumer-OS-Windows-Me/2100-1040_3-236499.html |title=Microsoft names new consumer OS: Windows Me |work=] |first=Stephanie |last=Miles |date=February 3, 2000 |access-date=December 18, 2010 |archive-date=June 17, 2011 |archive-url=https://web.archive.org/web/20110617100519/http://news.cnet.com/Microsoft-names-new-consumer-OS-Windows-Me/2100-1040_3-236499.html |url-status=live }}</ref>
|}

===Windows NT family===
{| class="sortable wikitable"
|+
|-
!Codename
!Preliminary name
!Final name
!Notes
!Ref
|-
|Razzle
|NT OS/2, Advanced Windows
|]
|Is also the name of a ] that sets up the Windows NT development environment. NT OS/2 reflected the first purpose of Windows NT to serve as the next version of ], before Microsoft and ] split up. Microsoft used the NT OS/2 code to release Windows NT 3.1.
|<ref>{{cite web
|url=http://blogs.msdn.com/b/bwill/archive/2004/06/22/163020.aspx#163236
|title=How well do you know your Microsoft acronyms?
|date=June 22, 2004
|access-date=2015-07-21
|archive-date=2014-04-04
|archive-url=https://web.archive.org/web/20140404070850/http://blogs.msdn.com/b/bwill/archive/2004/06/22/163020.aspx#163236
|url-status=live
}}</ref><ref>{{cite web|last1=Chen|first1=Raymond|title=Random internal Windows terminology: IDW, Razzle, and their forgotten partners IDS and Dazzle|url=https://devblogs.microsoft.com/oldnewthing/20181224-00/?p=100545|website=The Old New Thing|publisher=]|date=24 December 2018|access-date=4 December 2020|archive-date=15 February 2022|archive-url=https://web.archive.org/web/20220215071732/https://devblogs.microsoft.com/oldnewthing/20181224-00/?p=100545|url-status=live}}</ref><ref>{{Cite magazine|last=Johnston|first=Stuart J.|date=18 February 1991|title='Advanced Windows' May Resolve OS/2 Dilemma|url=https://books.google.com/books?id=XVAEAAAAMBAJ&pg=PT4|journal=]|volume=13|issue=7|pages=5|access-date=5 July 2021|archive-date=9 July 2021|archive-url=https://web.archive.org/web/20210709190127/https://books.google.com/books?id=XVAEAAAAMBAJ&pg=PT4|url-status=live}}</ref><ref>{{Cite magazine|last=Johnson|first=Stuart J.|date=8 July 1991|title=Microsoft drops OS/2 2.0 API, revamps 32-bit Windows plans|url=https://books.google.com/books?id=iVAEAAAAMBAJ&pg=PA103|journal=]|volume=13|issue=27|pages=1, 103|access-date=18 November 2021|archive-date=9 March 2022|archive-url=https://web.archive.org/web/20220309141231/https://books.google.com/books?id=iVAEAAAAMBAJ&pg=PA103|url-status=live}}</ref>
|- Windows Abby Hatcher Me 10 Server 2019
|Daytona
|{{N/A}}
|]
| Named after the ] in ].
|<ref>{{cite book
| title = Microsoft Windows Internals
| edition = 4th
| last1 = Russinovich
| first1 = Mark
| author-link = Mark Russinovich
| first2 = David A.
| last2 = Solomon
| year = 2005
| publisher = Microsoft Press
| isbn = 0-7356-1917-4
| quote = The first release of Windows NT was larger and slower than expected, so the next major push was a project called Daytona, named after the speedway in Florida. The main goals for this release were to reduce the size of the system, increase the speed of the system, and, of course, to make it more reliable.
| page = xx
| url = https://archive.org/details/isbn_9780735619173
}}</ref>
|-
|]
|{{N/A}}
|{{Dropped}}
|A cancelled project that would have fulfilled Bill Gates' "Information at your fingertips" vision
|<ref>{{Cite web |url=http://www.microsoft.com/presspass/press/1996/jun96/dirserpr.mspx |title=Microsoft Demonstrates Next-Generation Directory Server |website=] |access-date=2007-11-22 |archive-date=2009-01-12 |archive-url=https://web.archive.org/web/20090112225210/http://www.microsoft.com/presspass/press/1996/jun96/dirserpr.mspx |url-status=live }}</ref>
|-
|Shell Update Release
|{{N/A}}
|]
|{{N/A}}
|
|-
|Wolfpack
|{{N/A}}
|]
|{{N/A}}
|<ref>{{cite web
|url=http://news.cnet.com/Scalability-Day-falls-short/2100-1001_3-279928.html
|title=Scalability Day falls short
|last=Davis
|first=Jim
|work=]
|publisher=]
|date=May 20, 1997
|access-date=2009-05-23
|archive-date=2012-10-24
|archive-url=https://web.archive.org/web/20121024174534/http://news.cnet.com/Scalability-Day-falls-short/2100-1001_3-279928.html
|url-status=live
}}</ref>
|- |-
|Janus |Janus
|{{N/A}}
|{{Dropped}}
|Codename for the proposed 64-bit edition of ], which was never released.
|<ref>{{Cite journal |last=Thurrott |first=Paul |date=July 27, 1999 |title=64-bit Windows 2000 on track for mid-2000 |url=http://www.windowsitpro.com/article/news2/64-bit-windows-2000-on-track-for-mid-2000.aspx |url-status=dead |journal=Windows IT Pro |archive-url=https://archive.today/20120529015759/http://www.windowsitpro.com/article/news2/64-bit-windows-2000-on-track-for-mid-2000.aspx |archive-date=May 29, 2012}}</ref><ref>{{Cite web |date=August 26, 1999 |title=Windows 2000 to Launch at Comdex, 64-Bit Janus in the Wings |url=http://findarticles.com/p/articles/mi_m0CGN/is_1999_August_26/ai_55572391 |url-status=dead |archive-url=https://web.archive.org/web/20100718055750/http://findarticles.com/p/articles/mi_m0CGN/is_1999_August_26/ai_55572391/ |archive-date=July 18, 2010 |access-date=November 13, 2011 |website=Findarticles.com}}</ref>
|-
|Impala
|{{N/A}}
|]
|{{N/A}}
|<ref name="ntexpe">{{cite web
| url=http://msdn.microsoft.com/en-us/library/aa459171.aspx
| title=Getting to Know Windows NT Embedded and Windows XP Embedded
| first=Jon
| last=Fincher
| work=Get Embedded
| publisher=Microsoft
| date=November 20, 2001
| access-date=2009-05-23
| archive-date=2009-04-21
| archive-url=https://web.archive.org/web/20090421144800/http://msdn.microsoft.com/en-us/library/aa459171.aspx
| url-status=live
}}</ref>
|-
|]
|{{N/A}}
|{{Dropped}}
|Planned to be the first consumer-oriented release of Windows NT succeeding the ] series; merged with Odyssey to form Whistler.
|<ref>{{cite web |url=http://www.digibarn.com/collections/screenshots/XP%20Neptune%20Build%205111/index.htm |title=DigiBarn Screen Shots: Windows XP Neptune Build 5111 |work=Digibarn.com |publisher=Digital Barn Computer Museum |access-date=2013-06-15 |archive-date=2020-09-18 |archive-url=https://web.archive.org/web/20200918041438/http://www.digibarn.com/collections/screenshots/XP%20Neptune%20Build%205111/index.htm |url-status=live }}</ref>
|-
|Triton
|{{N/A}}
|{{Dropped}}
|A planned minor update to "Neptune".
|<ref>{{Cite web |title=Windows Triton - BetaArchive Wiki |url=https://www.betaarchive.com/index.php/Windows_Triton |access-date=2023-01-07 |website=www.betaarchive.com |language=en-GB}}</ref>
|-
|Asteroid
| |
|] |Windows 2000 Service Pack 1
| |
|<ref>{{Cite web |date=2012-05-29 |title=Windows 2000 service pack nearing release - ZDNet Asia News |url=https://archive.today/20120529015721/http://www.zdnetasia.com/news/hardware/0,39042972,13024785,00.htm |access-date=2024-09-14 |website=archive.ph}}</ref>
|- |-
|]
|Kato
|{{N/A}}
|{{Dropped}}
|Planned to be a successor to Windows 2000; merged with Neptune to form Whistler.
| |
|-
|Windows for Workgroups 3.1
|]
|Windows 2002
|]
|Named after ], where design retreats were held.
| |
|- |-
|Mantis
|Snowball
|{{N/A}}
|]
| Named after the ].
|<ref name="ntexpe" />
|-
|Freestyle
|{{N/A}}
|]
|{{N/A}}
|<ref>{{cite journal |url=https://www.pcmag.com/article2/0,2817,654995,00.asp |title=Only HP Selling Media Center PCs—For Now |journal=] |first=Mary Jo |last=Foley |date=October 29, 2002 |access-date=September 3, 2017 |archive-date=March 9, 2022 |archive-url=https://web.archive.org/web/20220309141232/https://www.pcmag.com/archive/only-hp-selling-media-center-pcs151for-now-32982 |url-status=live }}</ref><ref>{{cite web |url=http://news.cnet.com/Microsoft-frees-up-Freestyle/2100-1044_3-979772.html |title=Microsoft frees up Freestyle |work=] |first=Joe |last=Wilcox |date=January 8, 2003 |access-date=December 18, 2010 |archive-date=August 18, 2011 |archive-url=https://web.archive.org/web/20110818193401/http://news.cnet.com/Microsoft-frees-up-Freestyle/2100-1044_3-979772.html |url-status=live }}</ref>
|-
|Harmony
|{{N/A}}
|Windows XP Media Center Edition 2004
|{{N/A}}
|<ref>{{cite journal |url=https://www.pcmag.com/article2/0,2817,1304918,00.asp |title=Second-Generation Media Center Edition: Worth the Wait |journal=] |first=Bill |last=Howard |date=September 30, 2003 |access-date=September 3, 2017 |archive-date=April 14, 2016 |archive-url=https://web.archive.org/web/20160414121608/http://www.pcmag.com/article2/0,2817,1304918,00.asp |url-status=live }}</ref>
|-
|Symphony
|{{N/A}}
|Windows XP Media Center Edition 2005
|{{N/A}}
|<ref>{{cite journal |url=http://www.pcadvisor.co.uk/news/index.cfm?newsid=4192 |title=Microsoft aims high with Media Center update |journal=] |publisher=] |first=Joris |last=Evers |date=October 12, 2004}}</ref>
|-
|Slalom
|Longhorn Media Center Edition
|{{Dropped}}
|Longhorn was gonna have a Media Center edition but when Longhorn turned into Vista, the plan was scrapped and instead the Media Center application was available in Home Premium and Ulimate editions.
|-
|Emerald
|{{N/A}}
|Windows XP Media Center Edition 2005 Update Rollup 2
|{{N/A}}
|<ref name="emerald">{{cite web |url=http://www.eweek.com/c/a/Desktops-and-Notebooks/Microsoft-Has-New-Mission-for-Media-Center/ |title=Microsoft Has New Mission for Media Center |work=] |first=John G. |last=Spooner |date=October 11, 2005 |access-date=December 18, 2010 }}</ref>
|-
|Diamond
|{{N/A}}
|]
|Included with Windows Vista.
|<ref name="emerald" />
|-
|Springboard
|{{N/A}}
|{{N/A}}
|Set of enhanced security features, included in ].
|<ref>{{cite journal |url=http://www.windowsitpro.com/article/news2/windows-xp-sp2-to-be-springboard-to-longhorn.aspx |archive-url=https://wayback.archive-it.org/all/20170525045409/http://windowsitpro.com/windows-server/windows-xp-sp2-be-springboard-longhorn |url-status=dead |archive-date=May 25, 2017 |title=Windows XP SP2 to be 'Springboard' to Longhorn |journal=Windows IT Pro |first=Paul |last=Thurrott |date=October 15, 2003 }}</ref>
|-
|Lonestar
|{{N/A}}
|]
|{{N/A}}
|<ref>{{cite web |url=http://news.cnet.com/Next-Microsoft-Tablet-PC-software-renamed/2110-1001_3-5197209.html |title=Next Microsoft Tablet PC software renamed |work=] |first=Ina |last=Fried |date=October 15, 2003 |access-date=December 18, 2010 |archive-date=October 26, 2012 |archive-url=https://web.archive.org/web/20121026110018/http://news.cnet.com/Next-Microsoft-Tablet-PC-software-renamed/2110-1001_3-5197209.html |url-status=live }}</ref>
|-
|Whistler Server
|Windows 2002 Server,<br />Windows .NET Server,<br />Windows .NET Server 2003
|]
|{{N/A}}
|<ref>{{cite journal |url=http://www.windowsitpro.com/article/windows-server-2003/microsoft-sets-windows-server-2003-release-date.aspx |archive-url=https://archive.today/20130209130255/http://www.windowsitpro.com/article/windows-server-2003/microsoft-sets-windows-server-2003-release-date.aspx |url-status=dead |archive-date=February 9, 2013 |title=Microsoft Sets Windows Server 2003 Release Date |journal=Windows IT Pro |first=Paul |last=Thurrott |date=January 9, 2003 }}</ref><ref>{{cite journal |url=https://www.theregister.co.uk/2001/05/01/whistler_server_confirmed_as_windows/ |title=Whistler Server confirmed as Windows 2002 |journal=] |first=John |last=Lettice |date=May 1, 2001 |access-date=August 10, 2017 |archive-date=August 10, 2017 |archive-url=https://web.archive.org/web/20170810132553/https://www.theregister.co.uk/2001/05/01/whistler_server_confirmed_as_windows/ |url-status=live }}</ref>
|-
|Bobcat
|{{N/A}}
|Windows Small Business Server 2003
|Not to be confused with ].
|<ref>{{cite web |url=http://www.pcworld.com/article/102644/microsoft_shares_sharepoint_details.html |archive-url=https://archive.today/20120908081509/http://www.pcworld.com/article/102644/microsoft_shares_sharepoint_details.html |url-status=dead |archive-date=September 8, 2012 |title=Microsoft Shares Sharepoint Details |work=] |publisher=] |first=Ed |last=Scannell |date=July 15, 2002 }}</ref>
|-
|Eiger, Mönch
|{{N/A}}
|]
|Mönch included additional features for use on mobile devices.
|<ref>{{cite web |url=http://www.bit-tech.net/news/bits/2006/07/13/microsoft_releases_fundamentals/1 |title=Microsoft releases Fundamentals for older PCs |work=] |first=Glen |last=Chivers |date=July 13, 2006 |access-date=December 19, 2010 |archive-date=April 5, 2016 |archive-url=https://web.archive.org/web/20160405091301/http://www.bit-tech.net/news/bits/2006/07/13/microsoft_releases_fundamentals/1 |url-status=live }}</ref><ref>{{cite web |url=http://www.computerworld.com/s/article/101214/Microsoft_preparing_Windows_XP_based_thin_clients |title=Microsoft preparing Windows XP-based thin clients |work=] |publisher=] |first=Joris |last=Evers |date=April 24, 2005 |access-date=December 19, 2010 |archive-date=June 29, 2011 |archive-url=https://web.archive.org/web/20110629201747/http://www.computerworld.com/s/article/101214/Microsoft_preparing_Windows_XP_based_thin_clients |url-status=live }}</ref>
|-
|Longhorn
|{{N/A}}
|]
|Named after the Longhorn Bar in the ] ski resort; initially planned as a "minor release" between "Whistler" and "Blackcomb" (see below)
|<ref>{{Cite news
|url=http://www.microsoft.com/presspass/press/2005/jul05/07-22LHMA.mspx
|title=Media Alert: Microsoft Unveils Official Name for "Longhorn" and Sets Date for First Beta Targeted at Developers and IT Professionals
|work=Microsoft News Center
|publisher=Microsoft Corporation
|date=5 July 2005
|access-date=16 December 2010
|location=Redmond, Washington
|url-status=dead
|archive-url=https://web.archive.org/web/20101120150045/http://www.microsoft.com/presspass/press/2005/jul05/07-22LHMA.mspx
|archive-date=20 November 2010
}}</ref><ref>{{Cite news
|url = http://news.cnet.com/Longhorns-new-name-Windows-Vista/2100-1016_3-5799734.html
|title = Longhorn's new name: Windows Vista
|work = ]
|publisher = CBS Interactive
|date = 22 July 2005
|first1 = Mike
|last1 = Ricciuti
|access-date = 16 December 2010
|archive-date = 25 October 2012
|archive-url = https://web.archive.org/web/20121025142506/http://news.cnet.com/Longhorns-new-name-Windows-Vista/2100-1016_3-5799734.html
|url-status = live
}}</ref><ref>{{Cite news
|url = http://www.betanews.com/article/Longhorn-Gets-a-Name-Windows-Vista/1122002477
|title = Longhorn Gets a Name: Windows Vista
|work = Betanews
|date = 22 July 2005
|first1 = Ed
|last1 = Oswald
|first2 = Nate
|last2 = Mook
|access-date = 16 December 2010
|archive-date = 21 December 2010
|archive-url = https://web.archive.org/web/20101221081349/http://www.betanews.com/article/Longhorn-Gets-a-Name-Windows-Vista/1122002477
|url-status = live
}}</ref>
|-
|Blackcomb, Vienna
|{{N/a}}
|{{Dropped}}
|The purported successor to Whistler, and later, Longhorn. Named after ], where design retreats were held. Blackcomb was later renamed to ] in January 2006, named after the capital of Austria. Eventually cancelled due to ] and replaced with Windows 7.
|<ref name=":1">{{Cite web|date=2019-07-22|title=What was the code name for Windows 7?|url=https://devblogs.microsoft.com/oldnewthing/20190722-00/?p=102724|access-date=2020-06-25|website=The Old New Thing|language=en-US|archive-date=2021-09-26|archive-url=https://web.archive.org/web/20210926093909/https://devblogs.microsoft.com/oldnewthing/20190722-00/?p=102724|url-status=live}}</ref><ref>{{cite web |url=http://betanews.com/2006/01/19/blackcomb-renamed-to-vienna/ |title='Blackcomb' Renamed to 'Vienna' |work=] |date=January 19, 2006 |access-date=April 5, 2014 |archive-date=June 24, 2015 |archive-url=https://web.archive.org/web/20150624041641/http://betanews.com/2006/01/19/blackcomb-renamed-to-vienna/ |url-status=live }}</ref>
|-
|Q, Quattro
|{{N/A}}
|]
|{{N/A}}
|<ref>{{cite journal |url=http://www.windowsitpro.com/article/news2/q-it-up-windows-home-server-hits-external-beta.aspx |archive-url=https://archive.today/20130209083810/http://www.windowsitpro.com/article/news2/q-it-up-windows-home-server-hits-external-beta.aspx |url-status=dead |archive-date=February 9, 2013 |title=Q It Up: Windows Home Server Hits External Beta |journal=Windows IT Pro |first=Paul |last=Thurrott |date=February 13, 2007 }}</ref><ref>{{cite journal |url=http://www.computerworld.com/s/article/9007499/CES_Gates_expands_Microsoft_s_digital_home_plan |title=CES: Gates expands Microsoft's digital home plan |journal=] |first=Elizabeth |last=Montalbano |date=January 8, 2007 |access-date=December 20, 2010 |archive-date=May 16, 2010 |archive-url=https://web.archive.org/web/20100516043457/http://www.computerworld.com/s/article/9007499/CES_Gates_expands_Microsoft_s_digital_home_plan |url-status=live }}</ref>
|-
|Vail
|{{N/A}}
|]
|{{N/A}}
|<ref>{{cite journal |url=https://www.pcmag.com/business/article/public-preview-of-next-version |title=Public Preview of Windows Home Server "Vail" is Here |journal=] |first=Samara |last=Lynn |date=April 27, 2010 |access-date=September 3, 2017 |archive-date=August 31, 2010 |archive-url=https://web.archive.org/web/20100831004208/http://www.pcmag.com/business/article/public-preview-of-next-version |url-status=dead }}</ref>
|-
|Longhorn Server
|{{N/A}}
|]
|{{N/A}}
|<ref>{{cite web |url=https://abcnews.go.com/Technology/PCWorld/story?id=3675218 |title=Microsoft Begins Buildup to Windows Server 2008 Release |work=] |publisher=] |first=Eric |last=Lai |date=October 1, 2007 |access-date=June 28, 2020 |archive-date=March 3, 2016 |archive-url=https://web.archive.org/web/20160303165425/http://abcnews.go.com/Technology/PCWorld/story?id=3675218 |url-status=live }}</ref>
|-
|Cougar
|{{N/A}}
|Windows Small Business Server 2008
|{{N/A}}
|<ref name="cougarcentro">{{cite journal |url=http://www.itjungle.com/two/two022708-story03.html |title='Centro' and 'Cougar' Become Windows Server Essentials |journal=] |first=Alex |last=Woodie |volume=5 |issue=8 |date=February 27, 2008 |url-status=dead |archive-url=https://web.archive.org/web/20111212044145/http://www.itjungle.com/two/two022708-story03.html |archive-date=December 12, 2011 }}</ref>
|-
|Centro
|{{N/A}}
|]
|Named after the Spanish translation of the word "center".
|<ref name="cougarcentro" />
|-
|Windows 7
|{{N/A}}
|]
|The number 7 comes from incrementing the internal version number of ] (6.0) by one. Often incorrectly referred to as Blackcomb or Vienna, while the codenames actually refer to an earlier Vista successor project that was cancelled due to scope creep.
|<ref name=":1" /><ref>{{cite web |url=http://betanews.com/2007/02/15/microsoft-not-discussing-windows-7-office-14/ |title=Microsoft Not Discussing Windows 7, Office 14 |work=] |date=February 15, 2007 |access-date=April 5, 2014 |archive-date=April 7, 2014 |archive-url=https://web.archive.org/web/20140407072448/http://betanews.com/2007/02/15/microsoft-not-discussing-windows-7-office-14/ |url-status=live }}</ref><ref>{{cite web |url=http://www.upi.com/Business_News/2009/07/23/Microsoft-finalizes-Windows-7-code/UPI-87421248404771/ |title=Microsoft finalizes Windows 7 code |work=] |date=July 23, 2009 |access-date=December 20, 2010 |archive-date=December 26, 2010 |archive-url=https://web.archive.org/web/20101226163239/http://www.upi.com/Business_News/2009/07/23/Microsoft-finalizes-Windows-7-code/UPI-87421248404771 |url-status=live }}</ref>
|-
|Windows Server 7
| {{N/A}}
| ]
|{{N/A}}
| |
|-
|Windows for Workgroups 3.11
|Fiji
|]
|Windows Media Center TV Pack 2008
|Named after the country of ].
|<ref>{{cite web |url=https://arstechnica.com/journals/microsoft.ars/2008/06/02/windows-fiji-screenshots-leak-final-name-revealed |title=Windows Fiji screenshots leak, final name revealed? |work=] |first=Emil |last=Protalinski |date=June 2, 2008 |access-date=June 14, 2017 |archive-date=October 16, 2008 |archive-url=https://web.archive.org/web/20081016090927/http://arstechnica.com/journals/microsoft.ars/2008/06/02/windows-fiji-screenshots-leak-final-name-revealed |url-status=live }}</ref>
|-
|Cascades
|Windows Essential Business Server "v2"
|Windows Essential Business Server 2008 R2 (cancelled)
|Originally intended as the successor of ] but was cancelled "due to external factors".
|<ref>{{cite web
|url = http://blogs.technet.com/essentialbusinessserver/archive/2010/04/07/our-technical-findings-while-developing-ebs-v2.aspx
|title = Windows Essential Business Server Team Blog : Our Technical Findings While Developing EBS v2
|work = blogs.technet.com
|publisher = Windows Essential Business Server Team
|date = 7 April 2010
|access-date = 23 April 2010
|archive-date = 23 April 2010
|archive-url = https://web.archive.org/web/20100423125151/http://blogs.technet.com/essentialbusinessserver/archive/2010/04/07/our-technical-findings-while-developing-ebs-v2.aspx
|url-status = live
}}</ref>
|-
|Aurora
|{{N/A}}
|Windows Small Business Server 2011 Essentials
|{{N/A}}
|<ref>{{cite web
|url = http://www.neowin.net/news/windows-small-business-server-code-name-quotauroraquot-revealed
|title = Windows Small Business Server code name "Aurora" revealed
|work = Neowin.net
|first1 = Tom
|last1 = Warren
|date = 3 February 2010
|access-date = 16 December 2010
|archive-date = 6 February 2010
|archive-url = https://web.archive.org/web/20100206211553/http://www.neowin.net/news/windows-small-business-server-code-name-quotauroraquot-revealed
|url-status = live
}}</ref>
|-
|Quebec
|{{N/A}}
|]
|Named after the province of ]
|<ref>{{Cite news
|url = http://www.microsoft.com/presspass/press/2009/sep09/09-01NextWindowsEmbeddedPR.mspx?rss_fdn=Press%20Releases
|title = Microsoft Delivers Windows 7-Based Windows Embedded Standard 2011 Community Technology Preview
|work = Microsoft News Center
|publisher = Microsoft Corporation
|location = Redmond, Washington
|date = 9 September 2009
|access-date = 16 December 2010
|archive-date = 7 September 2009
|archive-url = https://web.archive.org/web/20090907161402/http://www.microsoft.com/presspass/press/2009/sep09/09-01NextWindowsEmbeddedPR.mspx?rss_fdn=Press%20Releases
|url-status = live
}}</ref>
|-
|Windows 8
|{{N/A}}
|]
|Often incorrectly referred to as Jupiter, Midori and Chidori. Jupiter is the application framework used to create "immersive" apps for Windows 8, and Midori was a separate, managed code operating system. (see below)
|<ref>{{Cite web |last=Center |first=Microsoft News |date=2011-06-01 |title=Previewing "Windows 8" |url=https://news.microsoft.com/2011/06/01/previewing-windows-8/ |access-date=2024-07-07 |website=Stories |language=en-US}}</ref><ref>{{Cite web |title=Microsoft Windows President Steven Sinofsky Introduces the New Look of Windows |url=https://allthingsd.com/20110601/up-next-at-d9-microsoft-windows-president-steven-sinofsky-live-at-d9/ |access-date=2024-07-04 |website=AllThingsD |language=en-US}}</ref><ref>{{Cite web |last=Protalinski |first=Emil |date=2009-11-23 |title=Microsoft targets 2012 for Windows 8 |url=https://arstechnica.com/information-technology/2009/11/microsoft-roadmap-says-windows-8-in-2012/ |access-date=2024-06-29 |website=Ars Technica |language=en-us}}</ref>
|-
| Windows Server "8"
| {{N/A}}
| ]
|{{N/A}}
|<ref name="ZDNet1">{{cite web | url=http://www.zdnet.com/blog/microsoft/windows-server-8-officially-dubbed-windows-server-2012/12475 | title=Windows Server "8" officially dubbed Windows Server 2012 | work=] | publisher=] | access-date=17 April 2012 | first=Mary Jo | last=Foley | date=17 April 2012 | archive-date=19 November 2014 | archive-url=https://web.archive.org/web/20141119011441/http://www.zdnet.com/blog/microsoft/windows-server-8-officially-dubbed-windows-server-2012/12475 | url-status=dead }}</ref>
|-
| Blue
| {{N/A}}
| ]
|{{N/A}}
|<ref name="blue">{{cite web | url=http://blogs.technet.com/b/microsoft_blog/archive/2013/03/26/looking-back-and-springing-ahead.aspx | title=Looking Back and Springing Ahead | work=The Official Microsoft Blog | publisher=] | access-date=Aug 17, 2013 | first=Frank X. | last=Shaw | date=26 March 2013 | archive-date=2 July 2013 | archive-url=https://web.archive.org/web/20130702224122/http://blogs.technet.com/b/microsoft_blog/archive/2013/03/26/looking-back-and-springing-ahead.aspx | url-status=live }}</ref>
|-
| Windows Server Blue
| {{N/A}}
| ]
|{{N/A}}
| |
|- |-
| Threshold
|Chicago
| Windows&nbsp;8.2{{citation needed|date=March 2024}}, Windows&nbsp;9{{citation needed|date=July 2024}}
| ]<br>Windows 10 November Update
| Named after a location seen in '']'', near which ] orbits.
|<ref name="zdnet-threshold">{{cite web | url=https://www.zdnet.com/article/microsoft-codename-threshold-the-next-major-windows-wave-takes-shape/ | title=Microsoft codename 'Threshold': The next major Windows wave takes shape | publisher=] | first=Mary Jo | website=] | date=December 2, 2013 | last=Foley | access-date=August 14, 2015 | archive-date=December 9, 2017 | archive-url=https://web.archive.org/web/20171209220704/http://www.zdnet.com/article/microsoft-codename-threshold-the-next-major-windows-wave-takes-shape/ | url-status=live }}</ref>
|-
| Redstone
| {{N/A}}
| ]<br>Windows 10 Creators Update<br>Windows 10 Fall Creators Update<br>Windows 10 April 2018 Update<br>]
| Named after a fictional mineral from '']''.
|<ref name="next update, first details">{{cite web | url=http://www.neowin.net/news/windows-redstone-will-come-in-two-waves-june-and-october-2016 | title=Windows Redstone will come in two waves, June and October 2016 | work=Neowin blog | publisher=Neowin | access-date=Apr 8, 2015 | first=Brad | last=Sams | date=Apr 7, 2015 | archive-date=April 9, 2015 | archive-url=https://web.archive.org/web/20150409111752/http://www.neowin.net/news/windows-redstone-will-come-in-two-waves-june-and-october-2016 | url-status=live }}</ref><ref name="big Windows update">{{cite web | url=https://www.engadget.com/2015/04/08/windows-10-update-redstone/ | title=Next year's big Windows 10 update is codenamed 'Redstone' | work=Engadget | publisher=AOL | access-date=Apr 8, 2015 | first=Daniel | last=Cooper | date=Apr 8, 2015 | archive-date=April 11, 2015 | archive-url=https://web.archive.org/web/20150411002737/https://www.engadget.com/2015/04/08/windows-10-update-redstone/ | url-status=live }}</ref>
|-
| Santorini
| ]
| {{Dropped}}
| Named after an ] in ]. Originally supposed to be a new OS to be released mid-late 2021, was eventually cancelled. Some of its features were integrated into ] and other products.
|<ref>{{cite web |url=https://www.theverge.com/2019/10/4/20897175/windows-10x-microsoft-lite-core-os-wcos-santorini-aruba-oasis-codenames |title=Microsoft Windows 10X: what the heck is it? |last=Hollister |first=Sean |date=October 4, 2019 |website=The Verge |access-date=June 29, 2020 |archive-date=October 8, 2021 |archive-url=https://web.archive.org/web/20211008222809/https://www.theverge.com/2019/10/4/20897175/windows-10x-microsoft-lite-core-os-wcos-santorini-aruba-oasis-codenames |url-status=live }}</ref>
|-
| Sun Valley
| {{n/a}}
| Windows 11
|Named after ].
|<ref>{{Cite news |last=Warren |first=Tom |date=June 16, 2021 |title=Windows 11's default wallpapers are Microsoft's best yet |work=] |url=https://www.theverge.com/2021/6/16/22536375/microsoft-windows-11-default-wallpaper |access-date=June 16, 2021 |archive-date=June 16, 2021 |archive-url=https://web.archive.org/web/20210616143030/https://www.theverge.com/2021/6/16/22536375/microsoft-windows-11-default-wallpaper |url-status=live }}</ref><ref>{{Cite news |last=Aufranc |first=Jean-Luc |date=June 16, 2021 |title=Windows 11 build leaked, Windows 10 support ending in 2025 |work=CNX Software |url=https://www.cnx-software.com/2021/06/16/windows-11-build-leaked-windows-10-support-ending-in-2025/ |access-date=June 16, 2021 |archive-date=June 16, 2021 |archive-url=https://web.archive.org/web/20210616143024/https://www.cnx-software.com/2021/06/16/windows-11-build-leaked-windows-10-support-ending-in-2025/ |url-status=live }}</ref><ref>{{Cite web|last=Parmar|first=Mayank|date=2021-06-09|title=Microsoft accidentally confirms Windows Sun Valley update|url=https://www.windowslatest.com/2021/06/09/microsoft-accidentally-confirms-windows-sun-valley-update/|access-date=2021-07-24|website=Windows Latest|language=en-US|archive-date=2021-07-24|archive-url=https://web.archive.org/web/20210724182155/https://www.windowslatest.com/2021/06/09/microsoft-accidentally-confirms-windows-sun-valley-update/|url-status=live}}</ref><ref>{{Citation|title=Watch Panos Panay, Chief Product Officer, Microsoft sending a special message to Windows Insiders| date=June 24, 2021 |url=https://www.youtube.com/watch?v=2BdbuXUcjw0 |archive-url=https://ghostarchive.org/varchive/youtube/20211222/2BdbuXUcjw0 |archive-date=2021-12-22 |url-status=live|language=en|access-date=2021-07-24}}{{cbignore}}</ref>
|-
| Hudson Valley
|{{N/A}}
|{{unknown}}
| A possibly-planned version of Windows scheduled to be released in 2025. Named after ]
| <ref>{{Cite web |author1=Zac Bowden |date=2023-03-28 |title=Microsoft plans major platform upgrades for "Windows 12" that will modernize the OS with AI, faster updates, and better security |url=https://www.windowscentral.com/software-apps/windows-11/microsoft-windows-corepc-modern-platform-hudson-valley-2024 |access-date=2023-05-09 |website=Windows Central |language=en}}</ref><ref>{{Cite web |title=Windows 12 will be a different, modular monster with faster updates, AI integrations, and more |url=https://www.techspot.com/news/98123-windows-12-different-modular-monster-faster-updates-ai.html |access-date=2023-05-09 |website=TechSpot |date=29 March 2023 |language=en-US}}</ref><ref>{{Cite web |author1=Alex Wawro |date=2023-03-28 |title='Windows 12' leak just teased powerful AI upgrades — here's what we know |url=https://www.tomsguide.com/news/windows-12-leak-just-teased-powerful-ai-upgrades-heres-what-we-know |access-date=2023-05-09 |website=Tom's Guide |language=en}}</ref>
|}

===Windows platform engineering milestones===
The following are code names used for internal development cycle ] of the Windows core, although they are not necessarily the code names of any of the resulting releases. With some exceptions, the semester designations usually matches the Windows version number.

{| class="sortable wikitable"
|-
! Codename
! Semester
! Release
! Notes
! Ref
|-
| Titanium
| 19H1
| ] May 2019 Update
| Named after the ] in the periodic table.
|<ref name=":0">{{Cite web|last=Foley|first=Mary Jo|title=What comes after Windows 10 19H1? Vanadium|url=https://www.zdnet.com/article/what-comes-after-windows-10-19h1-vanadium/|access-date=2020-06-25|website=ZDNet|language=en|archive-date=2022-02-23|archive-url=https://web.archive.org/web/20220223081546/https://www.zdnet.com/article/what-comes-after-windows-10-19h1-vanadium/|url-status=live}}</ref><ref>{{cite web |last1=Hassan |first1=Mehedi |title=Windows 10's Next Major Updates Will Be Codenamed Vanadium, Vibranium |url=https://www.thurrott.com/windows/windows-10/190138/windows-10s-next-major-updates-will-be-codenamed-vanadium-vibranium |website=Thurrott |date=October 31, 2018 |publisher=BWW Media Group |access-date=13 June 2021 |quote=Windows 10’s next major update is codenamed 19H1. |archive-date=13 June 2021 |archive-url=https://web.archive.org/web/20210613205930/https://www.thurrott.com/windows/windows-10/190138/windows-10s-next-major-updates-will-be-codenamed-vanadium-vibranium |url-status=live }}</ref>
|-
| Vanadium
| 19H2
| Windows 10 November 2019 Update
| Named after the ] in the periodic table.
|<ref name=":0"/><ref name="Future US, Inc">{{cite web |last1=Brown |first1=Matt |title=Next Windows 10 updates reportedly codenamed 'Vanadium' and 'Vibranium' |url=https://www.windowscentral.com/next-windows-10-updates-reportedly-codenamed-vanadium-and-vibranium |website=Windows Central |date=October 31, 2018 |publisher=Future US, Inc. |access-date=13 June 2021 |archive-date=13 June 2021 |archive-url=https://web.archive.org/web/20210613205931/https://www.windowscentral.com/next-windows-10-updates-reportedly-codenamed-vanadium-and-vibranium |url-status=live }}</ref><ref>{{cite web |last1=Hassan |first1=Mehedi |title=Windows 10's Next Major Updates Will Be Codenamed Vanadium, Vibranium |url=https://www.thurrott.com/windows/windows-10/190138/windows-10s-next-major-updates-will-be-codenamed-vanadium-vibranium |website=Thurrott |date=October 31, 2018 |publisher=BWW Media Group |access-date=13 June 2021 |quote=This means the next Windows 10 update, previously codenamed 19H2, will be called Vanadium (comes after Titanium/19H1). |archive-date=13 June 2021 |archive-url=https://web.archive.org/web/20210613205930/https://www.thurrott.com/windows/windows-10/190138/windows-10s-next-major-updates-will-be-codenamed-vanadium-vibranium |url-status=live }}</ref>
|-
| Vibranium
| 20H1
| Windows 10 May 2020 Update<br>Windows 10 October 2020 Update<br>Windows 10 May 2021 Update<br>Windows 10 November 2021 Update<br>Windows 10 2022 Update
| Named after the fictional metal ] in ] as continuing the previous line of ]s with ] could have caused confusion with the ].
|<ref name=":0" /><ref name="Future US, Inc"/><ref>{{cite web |last1=Hassan |first1=Mehedi |title=Windows 10's Next Major Updates Will Be Codenamed Vanadium, Vibranium |url=https://www.thurrott.com/windows/windows-10/190138/windows-10s-next-major-updates-will-be-codenamed-vanadium-vibranium |website=Thurrott |date=October 31, 2018 |publisher=BWW Media Group |access-date=13 June 2021 |archive-date=13 June 2021 |archive-url=https://web.archive.org/web/20210613205930/https://www.thurrott.com/windows/windows-10/190138/windows-10s-next-major-updates-will-be-codenamed-vanadium-vibranium |url-status=live }}</ref>
|-
| Manganese
| 20H2
| {{N/A}}{{efn|name=insider}}
| Named after the ] in the periodic table.
|<ref>{{Cite web|last=Tiwari|first=Aditya|date=2020-04-11|title=The Next Windows 10 Version Is Called "Manganese"|url=https://fossbytes.com/the-next-windows-10-version-is-called-manganese/|access-date=2020-06-25|website=Fossbytes|language=en-US|archive-date=2021-06-12|archive-url=https://web.archive.org/web/20210612203849/https://fossbytes.com/the-next-windows-10-version-is-called-manganese/|url-status=live}}</ref>
|-
| Iron
| 21H1
| ]{{efn|name=iron}}
| Named after the ] in the periodic table.
|<ref>{{Cite web|last=Shaikh|first=Rafia|date=2020-05-22|title=Windows 10 2021 Is Codenamed Iron (Fe) - Deleted Text Reveals|url=https://wccftech.com/windows-10-2021-is-codenamed-iron-fe-deleted-text-reveals/|access-date=2020-06-25|website=Wccftech|language=en-US|archive-date=2021-04-21|archive-url=https://web.archive.org/web/20210421140231/https://wccftech.com/windows-10-2021-is-codenamed-iron-fe-deleted-text-reveals/|url-status=live}}</ref>
|-
| Cobalt
| 21H2
| ]
| Named after the ] in the periodic table.
| |
|-
|]
| Nickel
| 22H2
| Windows 11 2022 Update
|Named after the ] in the periodic table. Originally planned to be the 22H1 semester, although that semester was ultimately skipped and Nickel shifted to 22H2, expanded to span the entire year.
|<ref>{{Cite web|last=Nayan|date=2021-06-21|title=Development of Windows 11 Summer'21 (co_release) & Fall'21 (co_refresh) releases explained in a collated timeline|url=https://thewincentral.com/windows-11-summer21-co_release-fall21-co_refresh-developments-explained-in-a-collated-timeline/|access-date=2021-08-17|website=WinCentral|language=en-US|archive-date=2021-08-17|archive-url=https://web.archive.org/web/20210817022518/https://thewincentral.com/windows-11-summer21-co_release-fall21-co_refresh-developments-explained-in-a-collated-timeline/|url-status=live}}</ref>
|-
| Copper
| 23H1
| {{N/A}}{{efn|name=insider}} <!-- builds from the RS_PRERELEASE branch are not matched to a specific Windows 11 release. -->
|Named after the ] in the periodic table.
|<ref>{{cite web|last1=Parmar|first1=Mayank|title=Windows 11 Build 22449 is now available with new loading animation|url=https://www.windowslatest.com/2021/09/03/windows-11-build-22449-is-now-available-with-new-loading-animation|website=Windows Latest|date=2 September 2021 |access-date=January 25, 2022|archive-date=January 25, 2022|archive-url=https://web.archive.org/web/20220125131232/https://www.windowslatest.com/2021/09/03/windows-11-build-22449-is-now-available-with-new-loading-animation/|url-status=live}}</ref>
|-
| Zinc{{citation needed|date=August 2023}} <!-- would make sense (follows previous names), but authoritative reference needed -->
| 23H2
| Windows Server, version 23H2
|Named after the ] in the periodic table.
|-
| Gallium {{citation needed|date=August 2023}} <!-- would make sense (follows previous names), but authoritative reference needed -->
| 24H1
| {{N/A}}{{efn|name=insider}} <!-- builds from the RS_PRERELEASE branch are not matched to a specific Windows 11 release. -->
|Named after the ] in the periodic table.
|-
| Germanium {{citation needed|date=February 2024}} <!-- would make sense (follows previous names), but authoritative reference needed -->
| 24H2
| Windows 11 2024 Update<br />Windows Server 2025
|Named after the ] in the periodic table.
|-
| Dilithium {{citation needed|date=August 2024}} <!-- would make sense (follows previous names), but authoritative reference needed -->
| 25H1
| {{N/A}}{{efn|name=insider}}
|Named after the ] from '']''.
| |
|}
{{notelist|refs=
{{efn|name=insider|Builds of these semesters were only released via the Windows Insider program.}}
{{efn|name=iron|Windows Server 2022 reports as version 21H2, although it is in fact based on the earlier Iron codebase.}}
}}

===Windows CE family===
{| class="sortable wikitable"
|- |-
!Codename
|Detroit
!Preliminary name
!Final name
!Ref
|-
|Pegasus, Alder || {{N/A}} || ] || <ref name="boling">{{cite web |first=Douglas |last=Boling |url=http://download.microsoft.com/documents/australia/medc2006/Windows_CE6_Architecture_Boling.ppt |title=The Windows CE New Kernel |work=Mobile & Embedded DevCon 2006 |publisher=] |year=2006 |access-date=2006-08-08 |archive-date=2020-07-25 |archive-url=https://web.archive.org/web/20200725070150/https://download.microsoft.com/documents/australia/medc2006/Windows_CE6_Architecture_Boling.ppt |url-status=live }}</ref>
|-
|Birch || {{N/A}} || ] || <ref name="boling"/>
|-
|Cedar || {{N/A}} || ] || <ref name="boling"/>
|-
|Talisker || Windows CE .NET || ] || <ref name="boling"/>
|-
|Jameson || {{N/A}} || Windows CE 4.1 || <ref name=hall-2006 />
|-
|McKendric || {{N/A}} || ] || <ref name=hall-2006 />
|-
|Macallan || {{N/A}} || ] || <ref name="boling"/>
|-
|Yamazaki || Windows CE 6.0 || ] || <ref name="boling"/><ref name=hall-2006>{{cite web|last=Hall|first=Mike|title=CE 6.0 - why the codename "Yamazaki" ?|url=http://blogs.msdn.com/b/mikehall/archive/2006/09/19/763146.aspx|work=Windows Embedded Blog|publisher=]|access-date=17 February 2014|date=20 September 2006|archive-date=18 September 2011|archive-url=https://web.archive.org/web/20110918183611/http://blogs.msdn.com/b/mikehall/archive/2006/09/19/763146.aspx|url-status=live}}</ref>
|-
|Chelan || Windows Embedded CE 7 || ] ||<ref>{{cite web|last=Foley|first=Mary Jo|title=Microsoft 'Chelan': A new Windows Embedded platform takes shape|url=http://www.zdnet.com/blog/microsoft/microsoft-chelan-a-new-windows-embedded-platform-takes-shape/2781|work=]|publisher=]|access-date=17 February 2014|date=14 May 2009|archive-date=22 February 2014|archive-url=https://web.archive.org/web/20140222180414/http://www.zdnet.com/blog/microsoft/microsoft-chelan-a-new-windows-embedded-platform-takes-shape/2781|url-status=dead}}</ref>
|}

===Windows Mobile===
{| class="sortable wikitable"
|-
!Codename
!Preliminary name
!Final name
!Ref
|-
|Rapier
|{{N/A}}
|Pocket PC 2000
|<ref name="ChrisDeHerrera1">{{cite web |title=Windows CE / Windows Mobile Versions |url=http://www.pocketpcfaq.com/wce/versions.htm |website=pocketpcfaq.com |publisher=] |first=Chris |last=De Herrera |access-date=2018-01-18 |archive-date=2019-09-04 |archive-url=https://web.archive.org/web/20190904061634/http://www.pocketpcfaq.com/wce/versions.htm |url-status=live }}</ref>
|-
|Merlin
|{{N/A}}
|Pocket PC 2002
|<ref name="ChrisDeHerrera1"/>
|-
|Ozone
|{{N/A}}
|Windows Mobile 2003
|<ref name="ChrisDeHerrera1"/>
|-
|Magneto
|{{N/A}}
|Windows Mobile 5
|<ref name="ChrisDeHerrera1"/>
|-
|Crossbow
|{{N/A}}
|Windows Mobile 6
|<ref name="ChrisDeHerrera1"/>
|-
|6 on 6
|{{N/A}}
|Windows Mobile 6.1.4
|<ref name="ChrisDeHerrera1"/>
|-
|Titanium
|{{N/A}}
|Windows Mobile 6.5
|<ref name="ChrisDeHerrera1"/>
|-
|Maldives
|Windows Mobile 7
|Windows Phone 7
|<ref name="ChrisDeHerrera1"/>
|}

=== Windows Phone ===
{| class="sortable wikitable"
|-
!Codename
!Preliminary name
!Final name
!Ref
|-
|Photon
|Windows Mobile 7 Series
|]
|<ref>{{cite web|last1=Rojas|first1=Peter|title=Photon, the next version of Windows Mobile|url=https://www.engadget.com/2005/12/08/photon-the-next-version-of-windows-mobile/|website=]|publisher=]|date=8 December 2005|access-date=3 September 2017|archive-date=28 January 2018|archive-url=https://web.archive.org/web/20180128190559/https://www.engadget.com/2005/12/08/photon-the-next-version-of-windows-mobile/|url-status=live}}</ref><ref name="Source for preliminary name">{{cite web|title=Mobile World Congress 2010 – day one overview|url=http://www.techcentral.co.za/mobile-world-congress-2010-day-one-overview/12826/|website=]|publisher=NewsCentral Media|date=15 February 2010|access-date=26 April 2015|archive-date=5 December 2014|archive-url=https://web.archive.org/web/20141205065622/http://www.techcentral.co.za/mobile-world-congress-2010-day-one-overview/12826/|url-status=live}}</ref>
|-
|Mango
| {{N/A}}
|]
|<ref>{{cite web |url=https://www.theverge.com/2011/10/24/2509332/windows-phone-75-mango-review |title=Windows Phone 7.5 'Mango' release details and updated review |work=] |publisher=] |date=September 27, 2011 |access-date=August 22, 2013 |first=Chris |last=Ziegler |archive-date=January 29, 2018 |archive-url=https://web.archive.org/web/20180129004335/https://www.theverge.com/2011/10/24/2509332/windows-phone-75-mango-review |url-status=live }}</ref><ref name="Codename tracker" />
|-
|Apollo
| {{N/A}}
|]
|<ref name="Codename tracker" />
|-
|Blue
| {{N/A}}
|]
|<ref name="zdnet-threshold" />
|-
|Threshold
| {{N/A}}
|]
|<ref name=zdnet-threshold />
|}

===Others===
{| class="sortable wikitable"
|-
!Codename
!Preliminary name
!Final name
!Notes
!Ref
|-
|]
|{{N/A}}
|{{N/A}}
|Experimental operating system based on the ] platform, using software-based ] as a replacement for hardware-based ]. Evolved into ].
|<ref>{{Cite web |url=http://research.microsoft.com/os/singularity/ |title=Microsoft Research Singularity Project |access-date=2005-12-01 |archive-date=2005-11-05 |archive-url=https://web.archive.org/web/20051105024937/http://research.microsoft.com/os/singularity/ |url-status=live }}</ref>
|-
| ]
| {{N/A}}
| {{N/A}}
| A ] ] being developed by Microsoft with joint effort of ].
| <ref>{{cite web|last1=Foley|first1=Mary Jo|title=Goodbye, XP. Hello, Midori|url=https://www.zdnet.com/article/goodbye-xp-hello-midori/|website=]|publisher=]|date=30 June 2008|access-date=27 January 2015|archive-date=14 June 2021|archive-url=https://web.archive.org/web/20210614194126/https://www.zdnet.com/article/goodbye-xp-hello-midori/|url-status=live}}</ref><ref>{{cite web|last1=Oiaga|first1=Marius|title=Life After Windows - Microsoft Midori Operating System|url=http://archive.news.softpedia.com/news/Life-After-Windows-Microsoft-Midori-Operating-System-88910.shtml|website=]|publisher=SoftNews|date=30 June 2008|access-date=27 January 2015|archive-url=https://web.archive.org/web/20141203092354/http://archive.news.softpedia.com/news/Life-After-Windows-Microsoft-Midori-Operating-System-88910.shtml|archive-date=3 December 2014|url-status=dead}}</ref>
|-
|Red Dog
|Windows Cloud
|]
|Microsoft ] platform
|<ref name="guide for the perplexed" />
|-
|Tahiti
|{{N/A}}
|{{N/A}}
|Supposedly a family of multi-core technologies including an operating system, applications and development tools designed to make better use of today's multi-core CPUs. ] may be a part of this suite of new Microsoft technologies.
|<ref name="Tahiti-manycore">{{Cite news
|url = https://www.zdnet.com/article/tahiti-microsofts-ultimate-many-core-destination/
|title = Tahiti: Microsoft's ultimate many-core destination
|work = ]
|publisher = ]
|date = 15 July 2008
|access-date = 22 December 2010
|first = Mary Jo
|last = Foley
|archive-date = 9 March 2022
|archive-url = https://web.archive.org/web/20220309141233/https://www.zdnet.com/article/tahiti-microsofts-ultimate-many-core-destination/
|url-status = live
}}</ref>
|-
|Tokyo
|Azure AD Cloud App Discovery
|Cloud App Discovery
|Azure-based data-directory service designed to help connect the right people to the right data.
|<ref name=tokyo1>{{cite web
|url=https://www.thurrott.com/podcasts/4202/windows-weekly-418-the-stephen-elop-signature-edition
|first=Mary Jo
|last=Foley
|title=Codename pick of the week: Project Tokyo
|date=18 June 2015
|publisher=]
|access-date=2016-11-16
|archive-date=2018-08-28
|archive-url=https://web.archive.org/web/20180828170117/https://www.thurrott.com/podcasts/4202/windows-weekly-418-the-stephen-elop-signature-edition
|url-status=live
}}</ref>
|-
|Zurich
|{{N/A}}
|.NET Services
|Part of ], Microsoft's ] platform, that focuses on extended software development based on ] to the cloud.
|<ref name="guide for the perplexed">{{cite web|last1=Foley|first1=Mary Jo|title=How many people does it take to fill Bill Gates' shoes?|url=https://www.zdnet.com/article/how-many-people-does-it-take-to-fill-bill-gates-shoes/|website=]|publisher=]|date=23 June 2008|access-date=27 January 2015|archive-date=20 January 2021|archive-url=https://web.archive.org/web/20210120051722/https://www.zdnet.com/article/how-many-people-does-it-take-to-fill-bill-gates-shoes/|url-status=live}}</ref><ref>{{cite web|last1=Foley|first1=Mary Jo|title=Ozzie foreshadows 'Zurich,' Microsoft's elastic cloud|url=https://www.zdnet.com/finance/ozzie-foreshadows-zurich-microsofts-elastic-cloud/|website=]|publisher=]|date=24 July 2008|access-date=27 January 2015|archive-date=6 March 2021|archive-url=https://web.archive.org/web/20210306152156/https://www.zdnet.com/article/ozzie-foreshadows-zurich-microsofts-elastic-cloud/|url-status=live}}</ref><ref>{{cite web|last1=Foley|first1=Mary Jo|title=Microsoft's Azure cloud platform: A guide for the perplexed|url=https://www.zdnet.com/article/microsofts-azure-cloud-platform-a-guide-for-the-perplexed/|website=]|publisher=]|date=27 October 2008|access-date=27 January 2015|archive-date=25 February 2021|archive-url=https://web.archive.org/web/20210225085919/https://www.zdnet.com/article/microsofts-azure-cloud-platform-a-guide-for-the-perplexed/|url-status=live}}</ref>
|}

==OS components==
{| class="sortable wikitable"
|-
!Codename
!Preliminary name
!Final name
!Notes
!Ref
|-
|Anaheim
|{{n/a}}
|]
|A rewrite of Microsoft's web browser, based on the ] project.
|<ref name="edge-chromium">{{Cite web|url=https://www.bleepingcomputer.com/news/microsoft/microsoft-replacing-edge-with-new-chromium-based-browser/|title=Microsoft Replacing Edge With New Chromium-based Browser|website=BleepingComputer|language=en-us|access-date=2019-09-02|archive-date=2018-12-07|archive-url=https://web.archive.org/web/20181207025558/https://www.bleepingcomputer.com/news/microsoft/microsoft-replacing-edge-with-new-chromium-based-browser/|url-status=live}}</ref>
|-
|Barcelona
|{{N/A}}
|Windows Defender Application Guard
|A security feature for running the ] web browser inside a virtual machine, thus isolating it from the rest of the system in the event that it was hacked.
|<ref name="400-mil2">{{cite web|last=Foley|first=Mary Jo|url=https://www.zdnet.com/article/microsoft-windows-10-now-on-400-million-devices/|title=Microsoft: Windows 10 now on 400 million devices|date=26 September 2016|website=]|publisher=]|access-date=27 September 2016|archive-date=18 April 2021|archive-url=https://web.archive.org/web/20210418065937/https://www.zdnet.com/article/microsoft-windows-10-now-on-400-million-devices/|url-status=live}}</ref>
|-
|Beihai
| |
|]
|Windows 95B (OSR 2)
|3D version of ]
|<ref>{{Cite web|url=https://www.zdnet.com/article/microsoft-reveals-more-about-whats-coming-in-windows-10-creators-update/|title=Microsoft reveals more about what's coming in Windows 10 Creators Update|last=Foley|first=Mary Jo|author-link=Mary Jo Foley|date=26 October 2016|website=]|publisher=]|access-date=28 October 2016|archive-date=26 October 2016|archive-url=https://web.archive.org/web/20161026233502/http://www.zdnet.com/article/microsoft-reveals-more-about-whats-coming-in-windows-10-creators-update/|url-status=live}}</ref>
|-
|Code Integrity Rooting
|Secure Startup
|]
|A security feature that checks and validates the integrity of Windows boot and system components.
|<ref name="Microsoft">{{cite web |title=Secure Startup: Full Volume Encryption: Executive Overview |url=http://download.microsoft.com/download/5/D/6/5D6EAF2B-7DDF-476B-93DC-7CF0072878E6/secure-start_exec.doc |publisher=Microsoft |date=21 April 2005 |access-date=30 January 2015 |archive-date=4 March 2016 |archive-url=https://web.archive.org/web/20160304083404/http://download.microsoft.com/download/5/D/6/5D6EAF2B-7DDF-476B-93DC-7CF0072878E6/secure-start_exec.doc |url-status=live }}</ref><ref>{{cite web|last1=Biddle |first1=Peter |title=Next-Generation Secure Computing Base |url=http://download.microsoft.com/download/1/8/f/18f8cee2-0b64-41f2-893d-a6f2295b40c8/TW04008_WINHEC2004.ppt |publisher=Microsoft |date=2004 |url-status=dead |archive-url=https://web.archive.org/web/20060827073150/http://download.microsoft.com/download/1/8/f/18f8cee2-0b64-41f2-893d-a6f2295b40c8/TW04008_WINHEC2004.ppt |archive-date=August 27, 2006 }}</ref>
|-
|Continuum
|Tablet Mode
|Continuum
|A ] feature that enables hybrid devices to switch between tablet mode and desktop mode. An immediately manifest effect is the Start screen getting maximized in tablet mode.
|<ref>{{cite web|last1=Trent|first1=Rod|title=Windows 10 Build 9926: Continuum Makes an Appearance as Tablet Mode|url=http://winsupersite.com/windows-10/windows-10-build-9926-continuum-makes-appearance-tablet-mode|website=SuperSite for Windows|publisher=]|date=26 January 2015|access-date=2015-01-27|archive-url=https://web.archive.org/web/20150128225713/http://winsupersite.com/windows-10/windows-10-build-9926-continuum-makes-appearance-tablet-mode|archive-date=2015-01-28|url-status=dead}}</ref>
|-
|Cornerstone
|Secure Startup
|BitLocker
|Full disk encryption feature introduced in Windows Vista and present in subsequent versions that utilizes the ] to perform integrity checking prior to operating system startup.
|<ref name="Microsoft"/><ref>{{cite web|last1=Thurrott|first1=Paul|title=Pre-PDC Exclusive: Windows Vista Product Editions|url=http://windowsitpro.com/article/windows-server-20082/pre-pdc-exclusive-windows-vista-product-editions-revealed-47665|website=SuperSite for Windows|publisher=]|date=9 September 2005|access-date=30 January 2015|archive-url=https://web.archive.org/web/20150402154123/http://windowsitpro.com/article/windows-server-20082/pre-pdc-exclusive-windows-vista-product-editions-revealed-47665|archive-date=2 April 2015|url-status=dead}}</ref>
|-
|Assistant
|{{N/A}}
|]
|An ] included with ], named after an ] in '']''
|<ref>{{cite web|title='Cortana': More on Microsoft's next-generation personal assistant|url=https://www.zdnet.com/article/cortana-more-on-microsofts-next-generation-personal-assistant/|work=]|publisher=CBS Interactive|access-date=15 January 2015|date=12 Sep 2013|first=Mary Jo|last=Foley|archive-date=29 December 2021|archive-url=https://web.archive.org/web/20211229145426/https://www.zdnet.com/article/cortana-more-on-microsofts-next-generation-personal-assistant/|url-status=live}}</ref>
|-
|Cougar
|{{N/A}}
|VMM32
|32-bit kernel
|<ref name="Windows 95-related" /><ref name="TONT-Cat names 1" /><ref name="TONT-Cat names 2" />
|-
|Darwin
|Microsoft Installer
|]
|A ] and ] for installing software on computers running Microsoft Windows operating systems
|<ref>{{cite web | url=http://blogs.msdn.com/chrsmith/archive/2005/07/01/Darwin_the_FX_the_Bootstrapper_and_you.aspx | title=Windows Installer, The .NET Framework, The Bootstrapper, and You | date=July 1, 2005 | access-date=July 23, 2006 | first=Chris | last=Smith | work=Chris Smith's completely unique view | publisher=] | archive-date=December 10, 2008 | archive-url=https://web.archive.org/web/20081210063652/http://blogs.msdn.com/chrsmith/archive/2005/07/01/Darwin_the_FX_the_Bootstrapper_and_you.aspx | url-status=live }}</ref>
|-
|Frosting
|{{N/A}}
|]
| |
|<ref>{{cite news |url=https://www.washingtonpost.com/wp-srv/business/longterm/microsoft/documents/gates0827p2.htm |title=Deposition of Bill Gates |date=August 27, 1998 |access-date=July 23, 2006 |newspaper=] |archive-date=April 10, 2016 |archive-url=https://web.archive.org/web/20160410054821/http://www.washingtonpost.com/wp-srv/business/longterm/microsoft/documents/gates0827p2.htm |url-status=live }}</ref>
|- |-
|Hydra
|Memphis
|{{N/A}}
|Windows 97
|], Windows Terminal Server
|]
|Terminal Server adds "multiheading" support to Windows (the ability to run multiple instances of the graphics subsystem), and the ] is a ] ] with multiple ].
|The codename was the key to activating an ] in Windows 98:
|<ref>{{cite web |url=http://www.windowsnetworking.com/articles_tutorials/Overview-Terminal-Services.html |title=Overview of Terminal Services |first=Mitch |last=Tullcoh |work=WindowsNetworking.com |publisher=TechGenix |date=February 24, 2005 |access-date=May 23, 2009 |archive-date=October 31, 2012 |archive-url=https://web.archive.org/web/20121031013157/http://windowsnetworking.com/articles_tutorials/Overview-Terminal-Services.html |url-status=live }}</ref>
* open the "Date and Time" control panel;
|-
* go to the "Timezone" page;
|Jaguar
* hold the Control key and drag a line with the mouse cursor from ] (or maybe ], codename of Windows NT 4 - the map is too small to tell) to ]. Still holding the Control key, drag another line from Memphis to ];
|{{N/A}}
* a ] opens with the credits for Windows 98.
|{{N/A}}
|16-bit DOS kernel for Windows 95 based on ], used by Windows 95 boot loader and compatibility layer.
|<ref name="Windows 95-related" /><ref name="TONT-Cat names 1">{{cite web|last1=Chen|first1=Raymond|title=The code names for various subprojects within Windows 95|url=https://blogs.msdn.microsoft.com/oldnewthing/20140520-00/?p=953|website=The Old New Thing|publisher=]|date=20 May 2014|access-date=23 January 2016|archive-date=4 July 2021|archive-url=https://web.archive.org/web/20210704050138/https://devblogs.microsoft.com/oldnewthing/|url-status=live}}</ref><ref name="TONT-Cat names 2">{{cite web|last1=Chen|first1=Raymond|title=What was the starting point for the Panther Win32 kernel?|url=https://blogs.msdn.microsoft.com/oldnewthing/20150421-00/?p=44193|website=The Old New Thing|publisher=]|date=21 April 2015|access-date=23 January 2016|archive-date=10 January 2019|archive-url=https://web.archive.org/web/20190110065948/https://blogs.msdn.microsoft.com/oldnewthing/20150421-00/?p=44193|url-status=live}}</ref>
|-
|Jupiter
|{{N/A}}
|]
|A new application framework on ] used to create cross-platform "immersive" ].
|<ref name=zdn-jupiter>{{cite web |title=More on Microsoft 'Jupiter' and what it means for Windows 8 |url=http://www.zdnet.com/blog/microsoft/more-on-microsoft-jupiter-and-what-it-means-for-windows-8/8373 |work=] |publisher=] |access-date=March 30, 2013 |archive-date=November 29, 2014 |archive-url=https://web.archive.org/web/20141129031310/http://www.zdnet.com/blog/microsoft/more-on-microsoft-jupiter-and-what-it-means-for-windows-8/8373 |url-status=dead }}</ref>
|-
|Monad
|MSH, Microsoft Shell
|]
|"Monads", according to philosopher ]'s ], are the ultimate elements of the universe, individual percipient beings, and MSH is similarly composed of small, individual modules the user puts in interrelation.
||<ref>{{cite web |url=http://blogs.msdn.com/b/nickmac/archive/2005/11/03/msh-microsoft-command-shell-codename-monad-beta-2-refresh.aspx |title=msh: Microsoft Command Shell (Codename: Monad) Beta 2 Refresh |work=Nick MacKechnie's Blog |publisher=] |date=October 27, 2008 |first=Nick |last=MacKechnie |access-date=August 22, 2013 |archive-date=April 7, 2014 |archive-url=https://web.archive.org/web/20140407233930/http://blogs.msdn.com/b/nickmac/archive/2005/11/03/msh-microsoft-command-shell-codename-monad-beta-2-refresh.aspx |url-status=live }}</ref>
|-
|Morro
|{{N/A}}
|]
|MSE was codenamed after the ] beach in ].
|<ref>Bott, Ed. {{Webarchive|url=https://web.archive.org/web/20120531114317/http://www.zdnet.com/blog/bott/how-good-is-microsofts-free-antivirus-software/1067 |date=2012-05-31 }}, ], June 18, 2009, accessed July 6, 2009.</ref><ref>Schofield, Jack. {{Webarchive|url=https://web.archive.org/web/20170406045944/https://www.theguardian.com/technology/blog/2009/jun/11/microsoft-morro-antivirus |date=2017-04-06 }}, guardian.co.uk, June 11, 2009, accessed July 6, 2009.</ref>
|-
|Neon
|{{N/A}}
|]
|Microsoft Fluent Design System is a revamp of the Windows UI based around five key components: Light, Depth, Motion, Material, and Scale.
|<ref>Microsoft {{Webarchive|url=https://web.archive.org/web/20180301050334/https://fluent.microsoft.com/ |date=2018-03-01 }}, ], May 11, 2017, accessed May 12, 2017.</ref>
|-
|O'Hare
|{{N/A}}
|]
|Internet Explorer 1, first shipped in ] for Windows 95: The codename ''O'Hare'' ties into the ''Chicago'' codename for Windows 95: ] is the largest airport in the city of ] — in Microsoft's words, "a point of departure to distant places from Chicago".
|<ref>{{cite web |url=https://technet.microsoft.com/en-us/library/dd316500.aspx |title=Internet Standards and Operating Systems - Why Integration Makes Sense |work=] |publisher=] |date=March 3, 1998 |access-date=July 31, 2009 |archive-date=August 12, 2017 |archive-url=https://web.archive.org/web/20170812133637/https://technet.microsoft.com/en-us/library/dd316500.aspx |url-status=live }}</ref>
|-
|Panther
|{{N/A}}
|{{N/A}}
|Cancelled. Panther was a 32-bit kernel based on Windows NT kernel.
|<ref name="TONT-Cat names 1" /><ref name="TONT-Cat names 2" />
|-
|Pinball
|{{N/A}}
|] (HPFS)
|"Pinball" is the nickname (as opposed to a codename) for HPFS because HPFS driver in ] is called PINBALL.SYS.
|<ref>{{cite web|title=Windows NT File System Files|url=http://support.microsoft.com/kb/100012/en-us|website=Support|publisher=]|access-date=27 January 2015}}</ref><ref>{{cite book|last1=Boswell|first1=William|title=Inside Windows 2000 Server|date=2000|publisher=New Riders|location=Indianapolis, Ind.|isbn=9781562059293|page=|chapter=Chapter 13: Managing File Systems|chapter-url=https://archive.org/details/insidewindows20000bosw/page/794}}</ref><ref>{{cite web|last1=Daily|first1=Sean|title=Using HPFS with NT 4.0|url=http://windowsitpro.com/windows-client/using-hpfs-nt-40|website=Windows IT Pro|publisher=]|date=30 September 1996|access-date=27 January 2015|archive-url=https://web.archive.org/web/20140806094021/http://windowsitpro.com/windows-client/using-hpfs-nt-40|archive-date=6 August 2014|url-status=dead}}</ref>
|-
|Piton
|{{N/A}}
|]
|Feature introduced in Windows Vista to support ]s
|<ref name="PitonWinHEC2004">{{cite web |url=http://download.microsoft.com/download/1/8/f/18f8cee2-0b64-41f2-893d-a6f2295b40c8/TW04026_WINHEC2004.ppt |title=Improved Disk Drive Power Consumption Using Solid-State Non-Volatile Memory |last=Nicholson |first=Clark |date=2004 |publisher=] |format=PPT |archive-url=https://web.archive.org/web/20060509115143/http://download.microsoft.com/download/1/8/f/18f8cee2-0b64-41f2-893d-a6f2295b40c8/TW04026_WINHEC2004.ppt |archive-date=May 9, 2006 |access-date=December 6, 2015}}</ref><ref name="SFRBRD">{{cite web |url=http://blogs.msdn.com/b/ianm/archive/2006/04/06/569715.aspx |title=SuperFetch, ReadyBoost and ReadyDrive: some new feature names for you |last=Moulster |first=Ian |date=April 6, 2006 |publisher=] |work=MSDN Blogs |access-date=September 17, 2015 |archive-date=November 24, 2015 |archive-url=https://web.archive.org/web/20151124043801/http://blogs.msdn.com/b/ianm/archive/2006/04/06/569715.aspx |url-status=live }}</ref>
|-
|Protogon
|{{N/A}}
|]
|The successor of ]
|<ref>{{cite web|url=http://www.zdnet.com/blog/microsoft/microsoft-goes-public-with-plans-for-its-new-windows-8-file-system/11666|title=Microsoft goes public with plans for its new Windows 8 file system|last=Foley|first=Mary Jo|date=2012-01-16|work=]|publisher=]|access-date=2017-11-29|archive-date=2013-05-21|archive-url=https://web.archive.org/web/20130521214738/http://www.zdnet.com/blog/microsoft/microsoft-goes-public-with-plans-for-its-new-windows-8-file-system/11666|url-status=dead}}</ref>
|-
|Rincon
|{{N/A}}
|]
|Rincon is a surfing beach in Puerto Rico
|<ref>{{cite web|last1=Lyndersay|first1=Sean|title=On names and codenames…|url=https://blogs.msdn.microsoft.com/justsean/2007/02/09/on-names-and-codenames/|website=Bit-cycling|publisher=]|date=9 February 2007|access-date=27 April 2016|archive-date=14 January 2019|archive-url=https://web.archive.org/web/20190114045956/https://blogs.msdn.microsoft.com/justsean/2007/02/09/on-names-and-codenames/|url-status=live}}</ref>
|-
|Spartan
|{{N/A}}
|]
|] first introduced in ], which uses ] rendering engine. Refers to ]s in '']''.
|<ref>{{cite web|last1=Warren|first1=Tom|title=This is Microsoft Edge, the replacement for Internet Explorer|url=https://www.theverge.com/2015/4/29/8511169/microsoft-edge-official-name-internet-explorer-upgrade|website=]|publisher=]|date=29 April 2015|access-date=3 September 2017|archive-date=29 April 2015|archive-url=https://web.archive.org/web/20150429211200/http://www.theverge.com/2015/4/29/8511169/microsoft-edge-official-name-internet-explorer-upgrade|url-status=live}}</ref>
|-
|Stimpy
|{{N/A}}
|]
|Applies to Windows 95 only.
|<ref name="TONT-Cat names 1" /><ref name="TONT-Cat names 2" />
|-
|Viridian
|{{N/A}}
|]
|] update for ]
|<ref>{{cite web|url=http://www.zdnet.com/blog/microsoft/microsoft-to-ship-windows-server-2008-over-time-in-eight-flavors/935|title=Microsoft to ship Windows Server 2008, over time, in eight flavors|website=]|access-date=2007-11-13|archive-date=2010-09-24|archive-url=https://web.archive.org/web/20100924135715/http://www.zdnet.com/blog/microsoft/microsoft-to-ship-windows-server-2008-over-time-in-eight-flavors/935|url-status=dead}}</ref>
|-
|]
|{{N/A}}
|{{n/a}}
|A cancelled data storage and ] system project based on ]s, first demonstrated in 2003 as an advanced storage subsystem for the ], designed for ] and management of ], ] as well as ].
|<ref>{{cite web|url=http://news.zdnet.co.uk/software/0,1000000121,2131385,00.htm |title=Leaked Windows hints at changes to come |work=] |publisher=] |archive-url=https://web.archive.org/web/20070930210357/http://news.zdnet.co.uk/software/0%2C1000000121%2C2131385%2C00.htm |archive-date=September 30, 2007 |date=September 30, 2007 |url-status=dead }}</ref><ref>{{cite web |url = https://www.theguardian.com/technology/2006/jun/29/insideit.guardianweeklytechnologysection |title = Why WinFS had to vanish |first = Jack |last = Schofield |work = ] |publisher = Guardian News and Media |date = June 29, 2006 |access-date = December 9, 2010 |archive-date = July 13, 2021 |archive-url = https://web.archive.org/web/20210713004634/https://www.theguardian.com/technology/2006/jun/29/insideit.guardianweeklytechnologysection |url-status = live }}</ref>
|-
|Cascadia
|{{N/A}}
|]
|A terminal emulator for Windows 10.
|<ref>{{cite web|author=Kayla|title=Cascadia Code|url=https://devblogs.microsoft.com/commandline/cascadia-code|website=Windows Command Line|access-date=9 March 2022|date=18 September 2019|archive-date=9 March 2022|archive-url=https://web.archive.org/web/20220309142107/https://devblogs.microsoft.com/commandline/cascadia-code/|url-status=live}}</ref>
|-
|}

==]==

===SQL Server family===
{{More citations needed section|date = January 2016}}
{| class="sortable wikitable"
|-
!Codename
!Final name
!Notes
!Ref
|- |-
|SQLNT
|Neptune
|] 4.21
| |
|{{Citation needed|date=June 2024}}
|N/A
|Never released.
|- |-
|SQL95
|Millenium, Georgia
|SQL Server 6.0
| |
|{{Citation needed|date=June 2024}}
|]
|-
|Hydra
|SQL Server 6.5
| |
|{{Citation needed|date=June 2024}}
|- |-
|Sphinx
! colspan="4" style="background: #f9f9f9; text-align: left;" | ''Windows NT family''
|SQL Server 7.0
|
|<ref>{{cite web
|url = http://www.winsupersite.com/reviews/sql7_workshop.asp
|title = SQL Server 7 "Sphinx" Technical Workshop Reviewed
|last = Thurrott
|first = Paul
|author-link = Paul Thurrott
|date = February 27, 1998
|access-date = 2009-05-23
|work = SuperSite for Windows
|publisher = ]
|url-status = dead
|archive-url = https://web.archive.org/web/20090829074619/http://www.winsupersite.com/reviews/sql7_workshop.asp
|archive-date = August 29, 2009
}}</ref>
|- |-
|Plato
|OS/2 3.0
|] |] 7.0
|"OLAP Services" was later renamed ]
|Windows NT 3.1
|<ref>{{cite web|title=CNet: Microsoft adds to Plato feature list|url=http://news.cnet.com/Microsoft-adds-to-Plato-feature-list/2100-1001_3-215561.html|access-date=2011-07-07|archive-date=2014-10-20|archive-url=https://web.archive.org/web/20141020192008/http://news.cnet.com/Microsoft-adds-to-Plato-feature-list/2100-1001_3-215561.html|url-status=live}}</ref>
|-
|Shiloh
|SQL Server 2000
|Version 8
|{{Citation needed|date=June 2024}}
|-
|Rosetta
|] in SQL Server 2000
| |
|{{Citation needed|date=June 2024}}
|- |-
|Yukon
|Daytona
|SQL Server 2005
|Version 9
|<ref>{{cite web
|url=https://docs.microsoft.com/previous-versions/sql/sql-server-2005
|title=Books Online for SQL Server 2005
|access-date=2010-11-11
|work=]
|date=3 December 2008
|publisher=]
|archive-date=2022-03-09
|archive-url=https://web.archive.org/web/20220309141234/https://docs.microsoft.com/en-us/previous-versions/sql/sql-server-2005/ms130214(v=sql.90)
|url-status=live
}}</ref>
<ref name=yukon>{{cite web
|title=Why Browser is installed under 90\shared directory rathar than 100\Shared?
|url=https://blogs.msdn.com/b/sql_protocols/archive/2008/04/07/why-browser-is-installed-under-90-shared-directory-rathar-than-100-shared.aspx
|work=Microsoft SQL Server Protocols Team Blog
|publisher=]
|date=April 7, 2008
|access-date=2011-02-01
|archive-date=2015-09-24
|archive-url=https://web.archive.org/web/20150924164631/http://blogs.msdn.com/b/sql_protocols/archive/2008/04/07/why-browser-is-installed-under-90-shared-directory-rathar-than-100-shared.aspx
|url-status=live
}}</ref>
|-
|Picasso
|] in SQL Server 2005
| |
|{{Citation needed|date=June 2024}}
|Windows NT 3.5
|-
|Katmai
|SQL Server 2008
|Version 10
|<ref>{{cite web
|url=https://docs.microsoft.com/previous-versions/sql/sql-server-2008
|title=Books Online for SQL Server 2008
|access-date=2010-11-11
|work=]
|date=October 2010
|publisher=]
|archive-date=2022-03-09
|archive-url=https://web.archive.org/web/20220309141234/https://docs.microsoft.com/en-us/previous-versions/sql/sql-server-2008/ms130214(v=sql.100)
|url-status=live
}}</ref>
<ref>{{cite web
|title=ChannelWeb: Next SQL Server stop: Katmai
|url=http://www.crn.com/storage/170702999
|access-date=2005-11-05
|url-status=dead
|archive-url=https://web.archive.org/web/20070322212538/http://www.crn.com/storage/170702999
|archive-date=2007-03-22
}}</ref>
|-
|Kilimanjaro
|SQL Server 2008 R2
|Version 10.5
|<ref>{{cite web
|url=https://docs.microsoft.com/previous-versions/sql/sql-server-2008-r2
|title=Books Online for SQL Server 2008 R2
|access-date=2010-11-11
|work=]
|publisher=]
|archive-date=2022-03-09
|archive-url=https://web.archive.org/web/20220309141244/https://docs.microsoft.com/en-us/previous-versions/sql/sql-server-2008-r2/ms130214(v=sql.105)
|url-status=live
}}</ref>
|-
|Blue
|SQL Server 2008 Report Designer 2.0
|This is the standalone release of the tool for ]. It must not be confused with Report Builder 2.0.
|<ref>{{cite web
|title=Silvaware: What's up with the new SSRS 2008 Report Designer
|url=http://silvaware.blogspot.com/2008/04/whats-up-with-new-ssrs-2008-report.html
|access-date=2008-09-13
|archive-date=2010-05-25
|archive-url=https://web.archive.org/web/20100525024426/http://silvaware.blogspot.com/2008/04/whats-up-with-new-ssrs-2008-report.html
|url-status=live
}}</ref>
<ref>{{cite web
|title=Designing and Implementing Reports Using Report Designer (Reporting Services)
|url=https://technet.microsoft.com/en-us/library/ms159253(v=sql.100).aspx
|website=SQL Server 2008 Books Online
| date=October 2010 |publisher=]
|access-date=23 August 2015
|archive-date=14 April 2016
|archive-url=https://web.archive.org/web/20160414035445/https://technet.microsoft.com/en-us/library/ms159253(v=sql.100).aspx
|url-status=live
}}</ref>
<ref>{{cite web
|title=Designing and Implementing Reports Using Report Builder 2.0
|url=https://technet.microsoft.com/en-us/library/dd220530(v=sql.100).aspx
|website=SQL Server 2008 Books Online
| date=October 2010 |publisher=]
|access-date=23 August 2015
|archive-date=14 April 2016
|archive-url=https://web.archive.org/web/20160414091949/https://technet.microsoft.com/en-us/library/dd220530(v=sql.100).aspx
|url-status=live
}}</ref>
|-
|Denali
|SQL Server 2012
|Version 11
|<ref>{{cite web
|url=http://www.microsoft.com/sqlserver/en/us/product-info/future-editions.aspx
|title=Microsoft SQL Server Future Editions
|access-date=2010-11-11
|publisher=]
|archive-date=2011-07-11
|archive-url=https://web.archive.org/web/20110711201427/http://www.microsoft.com/sqlserver/en/us/product-info/future-editions.aspx
|url-status=live
}}</ref>
<ref>{{cite web
|url=http://msdn.microsoft.com/en-us/library/ms130214(v=sql.110).aspx
|title=Books Online for SQL Server 2012
|access-date=2010-11-11
|work=]
|publisher=]
|archive-date=2017-09-21
|archive-url=https://web.archive.org/web/20170921214549/https://msdn.microsoft.com/en-us/library/ms130214(v=sql.110).aspx
|url-status=live
}}</ref>
<ref>{{cite web
|title=SQL Server 2012 Launches 2012 H1
|date=13 October 2011
|url=http://news.softpedia.com/news/SQL-Server-2012-Launches-in-H1-2012-Now-in-the-Final-Production-Stages-227430.shtml
|access-date=2011-10-14
|archive-date=2016-12-07
|archive-url=https://web.archive.org/web/20161207154518/http://news.softpedia.com/news/SQL-Server-2012-Launches-in-H1-2012-Now-in-the-Final-Production-Stages-227430.shtml
|url-status=live
}}</ref>
|-
|Juneau
|SQL Server Data Tools
|Was included in SQL Server 2012, later released as a standalone downloadable application
|<ref>{{cite web
|url=http://msdn.microsoft.com/en-us/data/gg427686
|title=SQL Server Developer Tools, Codename "Juneau"
|access-date=2011-02-25
|work=]
|publisher=]
|archive-date=2015-01-10
|archive-url=https://web.archive.org/web/20150110035747/http://msdn.microsoft.com/en-us/data/gg427686
|url-status=live
}}</ref>
|-
|Crescent
|Power View
|A data visualisation tool that originally shipped as part of SQL Server 2012, later an add-in for Microsoft Excel
|<ref>{{cite web
|url=http://blogs.msdn.com/b/sqlrsteamblog/archive/2010/11/09/a-glimpse-at-project-crescent.aspx
|title=A Glimpse at Project Crescent
|date=2011-02-25
|work=SQL Server Reporting Services Team Blog
|publisher=]
|access-date=2011-02-25
|archive-date=2010-12-17
|archive-url=https://web.archive.org/web/20101217081037/http://blogs.msdn.com/b/sqlrsteamblog/archive/2010/11/09/a-glimpse-at-project-crescent.aspx
|url-status=live
}}</ref>
|-
|SQL14
|SQL Server 2014
|Version 12
|<ref>{{cite web
|url=https://docs.microsoft.com/en-us/sql/2014-toc/books-online-for-sql-server-2014?view=sql-server-2014
|title=Books Online for SQL Server 2014
|date=2010-11-11
|work=]
|publisher=]
|access-date=2019-08-28
|archive-date=2019-08-25
|archive-url=https://web.archive.org/web/20190825193450/https://docs.microsoft.com/en-us/sql/2014-toc/books-online-for-sql-server-2014?view=sql-server-2014
|url-status=dead
}}</ref>
|-
|]
|SQL Server In-Memory OLTP
|] engine built into SQL Server 2014
|<ref>{{cite web
|url=https://docs.microsoft.com/sql/relational-databases/in-memory-oltp/overview-and-usage-scenarios
|title=Overview of In-Memory
|date=2017-09-04
|work=SQL Server Blog
|publisher=]
|access-date=2019-08-28
|archive-date=2022-03-09
|archive-url=https://web.archive.org/web/20220309141237/https://docs.microsoft.com/en-us/sql/relational-databases/in-memory-oltp/overview-and-usage-scenarios?view=sql-server-ver15
|url-status=live
}}</ref>
|-
|SQL16
|SQL Server 2016
|Version 13
|<ref>{{cite web
|url=https://docs.microsoft.com/en-us/sql/sql-server/sql-server-technical-documentation?view=sql-server-2016
|title=Books Online for SQL Server 2016
|date=2017-07-21
|work=]
|publisher=]
|access-date=2019-08-28
|archive-date=2022-03-09
|archive-url=https://web.archive.org/web/20220309141301/https://docs.microsoft.com/en-us/sql/sql-server/?view=sql-server-2016
|url-status=live
}}</ref>
|-
|Helsinki
|SQL Server 2017
|Version 14
|<ref>{{cite web
|url=https://docs.microsoft.com/en-us/sql/sql-server/sql-server-technical-documentation?view=sql-server-2017
|title=Books Online for SQL Server 2017
|date=2017-10-31
|work=]
|publisher=]
|access-date=2019-08-28
|archive-date=2019-09-11
|archive-url=https://web.archive.org/web/20190911025100/https://docs.microsoft.com/en-us/sql/sql-server/sql-server-technical-documentation?view=sql-server-2017
|url-status=live
}}</ref>
<ref>{{cite web
|title=SQL Server on Linux, aka project Helsinki: Story behind the idea
|url=https://blogs.msdn.microsoft.com/slavao/2016/12/20/sql-server-on-linux-aka-project-helsinki-story-behind-the-idea/
|access-date=2019-04-20
|archive-date=2019-04-20
|archive-url=https://web.archive.org/web/20190420145740/https://blogs.msdn.microsoft.com/slavao/2016/12/20/sql-server-on-linux-aka-project-helsinki-story-behind-the-idea/
|url-status=live
}}</ref>
|-
|Seattle
|SQL Server 2019
|Version 15
|<ref>{{cite news
|url=https://www.microsoft.com/en-us/sql-server/sql-server-2019
|title=SQL Server 2019
|access-date=2018-09-25
|archive-date=2011-07-17
|archive-url=https://web.archive.org/web/20110717063252/http://www.microsoft.com/sqlserver/2008/en/us/editions-compare.aspx
|url-status=live
}}</ref>
|-
|Aris
|SQL Server Big Data Clusters
|Announced at ] 2018 event on September 24–28. Retirement announced for Feb-28 2025
|<ref>{{cite news
|url=https://docs.microsoft.com/en-us/sql/big-data-cluster/big-data-cluster-overview?view=sqlallproducts-allversions
|title=SQL Server Big Data Clusters
|access-date=2019-09-27
|archive-date=2020-08-07
|archive-url=https://web.archive.org/web/20200807005131/https://docs.microsoft.com/en-us/sql/big-data-cluster/big-data-cluster-overview?view=sqlallproducts-allversions
|url-status=live
}}</ref>
|-
|Dallas
|SQL Server 2022
|Version 16. Public preview available for download. Announced at ] 2022 event on May 24
|<ref>{{cite news
|url=https://www.microsoft.com/en-us/sql-server/sql-server-2022
|title=SQL Server 2022
}}</ref>
|}

===Others===
{| class="sortable wikitable"
|-
!Codename
!Final name
!Ref
|-
|Hermes
|] 1.0
|<ref>
{{cite web
|url = http://58.240.47.242/~hz/win32/chic_mgt.htm
|title = Press Release: Windows 95 System Management Architecture
|publisher = ]
|date = October 29, 1996
|access-date = 2009-07-31
|url-status = dead
|archive-url = https://web.archive.org/web/20110705171134/http://58.240.47.242/~hz/win32/chic_mgt.htm
|archive-date = July 5, 2011
}}</ref>
|-
|Catapult
|] 1.0
|<ref>
{{cite web
| url=http://www.microsoft.com/presspass/press/1996/oct96/proxypr.mspx
| title=Press Release: Microsoft Ships Proxy Server 1.0
| work=News Center
| publisher=]
| date=July 26, 1994
| access-date=2011-02-07}}</ref>
|-
| Geneva
| ]
| <ref>{{cite web|last=Dave|first=Martinez|title=Microsoft and CA - ADFS Interop|url=http://download.microsoft.com/download/C/F/D/CFD1D9C8-EBA4-4780-B34B-DBEB5A4792BF/CA-ADFS%20Interop.pdf|work=]|access-date=22 July 2011|date=July 2009|archive-url=https://web.archive.org/web/20120326012948/http://download.microsoft.com/download/C/F/D/CFD1D9C8-EBA4-4780-B34B-DBEB5A4792BF/CA-ADFS%20Interop.pdf|archive-date=26 March 2012|url-status=dead}}</ref>
|-
| Falcon
| ]
| <ref>{{cite journal |first=Maggie |last=Biggs |title=Falcon delivers distributed application messages |journal=] |volume=19 |issue=18 |date=5 May 1997 |page=114 |issn=0199-6649 |oclc=61313585 |url=https://books.google.com/books?id=FTwEAAAAMBAJ&pg=PA114 |access-date=21 October 2020 |archive-date=9 March 2022 |archive-url=https://web.archive.org/web/20220309141235/https://books.google.com/books?id=FTwEAAAAMBAJ&pg=PA114 |url-status=live }}</ref>
|-
| Viper
| ]
| <ref>{{cite journal |first=Maggie |last=Biggs |title=Viper bites into the enterprise |journal=InfoWorld |volume=18 |issue=46 |date=11 November 1996 |page=97 |issn=0199-6649 |oclc=191857055 |url=https://books.google.com/books?id=hjoEAAAAMBAJ&pg=PA97}}</ref>
|-
| Normandy
| ]
| <ref>{{cite web|title=Microsoft Announces "Normandy," a New Platform for Commercial Internet Services; First Solution Designed Specifically for ISPs, Commercial Web Sites|date=4 June 1996 |url=https://news.microsoft.com/1996/06/04/microsoft-announces-normandy-a-new-platform-for-commercial-internet-services-first-solution-designed-specifically-for-isps-commercial-web-sites/}}</ref>
|-
|Stirling
|]
|<ref>{{cite web|title=Business Ready Security news at WPC|url=http://blogs.technet.com/b/forefront/archive/2009/07/13/business-ready-security-news-at-wpc.aspx|work=Forefront Team Blog|publisher=Microsoft|access-date=10 August 2013|date=13 July 2009|archive-date=6 June 2013|archive-url=https://web.archive.org/web/20130606001558/http://blogs.technet.com/b/forefront/archive/2009/07/13/business-ready-security-news-at-wpc.aspx|url-status=live}}</ref>
|}

==Developers tools==

===] family===
{| class="sortable wikitable"
|-
!Codename
!Preliminary name
!Final name
!Notes
!Ref
|-
|Thunder
| |
|Visual Basic 1.0
|The first version of ]. The standard ]s and ]s created by the Visual Basic ] all have "Thunder" as a prefix of their internal type names (for example, ]s are internally known as ThunderCommandButton).
|<ref name="chrissmith">{{cite web | url=http://blogs.msdn.com/chrsmith/archive/2006/04/30/Some_Microsoft_codenames.aspx | title=Some Microsoft codenames | date=April 30, 2006 | access-date=2006-07-23 | first=Chris |last=Smith | work=Chris Smith's completely unique view | publisher=] |archive-url=https://web.archive.org/web/20100311072314/http://blogs.msdn.com/chrsmith/archive/2006/04/30/Some_Microsoft_codenames.aspx |archive-date=11 March 2010}}</ref>
|- |-
|Escher
|Cairo
| |
|] for MS-DOS
|Windows NT 4.0
| |
|{{Citation needed|date=June 2024}}
|- |-
|Dolphin
|Wolfpack
| |
|]
|Cluster Server
| |
|{{Citation needed|date=June 2024}}
|- |-
|Zamboni
|Hydra
|
|Terminal Services
|Microsoft Visual C++ 4.1
|Terminal Server
|After ], an ice resurfacing machine.
|Terminal Server adds "]" support to Windows, and the ] was a ] ] with multiple ]s.
|<ref name="chrissmith"/>
|- |-
|Boston
|Impala
| |
|]
|]
|Named for ]
|<ref>{{cite web |url=http://www.v3.co.uk/v3-uk/news/1947659/in-brief-microsoft-names-boston-visual-studio |title=In brief: Microsoft names Boston Visual Studio 97 |work=v3.co.uk |publisher=Incisive Media |date=29 January 1997 |first=Cath |last=Everett |access-date=22 August 2012 |archive-date=3 April 2016 |archive-url=https://web.archive.org/web/20160403034817/http://www.v3.co.uk/v3-uk/news/1947659/in-brief-microsoft-names-boston-visual-studio |url-status=live }}</ref>
|-
|Aspen
| |
|]
|Named after the popular ski destination ]
|<ref>{{cite web |url=http://appdb.winehq.org/objectManager.php?sClass=version&iId=4647&iTestingId=15855 |title=Visual Studio 1998 (6.0) |work=WineHQ |publisher=CodeWeavers |access-date=May 18, 2013 |archive-date=May 17, 2013 |archive-url=https://web.archive.org/web/20130517163900/http://appdb.winehq.org/objectManager.php?sClass=version&iId=4647&iTestingId=15855 |url-status=live }}</ref>
|- |-
|Cassini Web Server
| |
|ASP.NET Development Server
|Windows NT 5.0
|The lightweight local Web server that is launched in Visual Studio in order to test Web projects
|]
|<ref>{{cite web |url=http://msdn.microsoft.com/en-us/library/58wxa9w5.aspx |title=Web Servers in Visual Studio for ASP.NET Web Projects |work=] |publisher=] |access-date=August 22, 2013 |archive-date=November 5, 2017 |archive-url=https://web.archive.org/web/20171105012822/https://msdn.microsoft.com/en-us/library/58wxa9w5.aspx |url-status=live }}</ref>
|First major Windows release since Windows 2.0 without a codename.
|- |-
|Hatteras
|Astroid
|Visual Studio Team System's Source Control System
|{{N/A}}
|Named after the ]house in the ] region of ]
|<ref name="outerbanks">{{cite web |url=http://blogs.msdn.com/crathjen/archive/2004/11/16/258542.aspx |title=Hatteras, Currituck, Ocracoke |date=November 16, 2004 |access-date=2006-07-23 |first=Chris |last=Rathjen |work=Chris Rathjen blog |publisher=] |archive-date=2006-04-30 |archive-url=https://web.archive.org/web/20060430133825/http://blogs.msdn.com/crathjen/archive/2004/11/16/258542.aspx |url-status=live }}</ref>
|-
|Ocracoke
|Visual Studio Team System load testing suite
|{{N/A}}
|Named after the ]house on ], also in North Carolina
|<ref name="outerbanks" />
|-
|Currituck
|Team Foundation Work Item Tracking
|{{N/A}}
|Named after the ] in ]
|<ref name="outerbanks" />
|-
|Bodie
|Team Foundation Server SDK
|{{N/A}}
|Named after the ]house in ]
|<ref name="outerbanks" />
|-
|Tuscany
| |
|Online version of Visual Studio.
|Windows 2000 Service Pack 1
|Currently a research project
|<ref>{{Cite web |url=http://blogs.msdn.com/johnmont/archive/2006/01/11/511402.aspx |title=A View from Elsewhere : A "Live" Version of Visual Studio? |access-date=2006-01-19 |archive-date=2006-01-17 |archive-url=https://web.archive.org/web/20060117092220/http://blogs.msdn.com/johnmont/archive/2006/01/11/511402.aspx |url-status=live }}</ref>
|-
|]
| |
|{{N/A}}
|A Microsoft research software development kit
|<ref>{{cite web |url=http://research.microsoft.com/en-us/collaboration/focus/cs/phoenix.aspx |title=Phoenix Compiler and Shared Source Common Language Infrastructure |work=] |publisher=] |access-date=August 22, 2013 |archive-date=June 9, 2016 |archive-url=https://web.archive.org/web/20160609072721/http://research.microsoft.com/en-us/collaboration/focus/cs/phoenix.aspx |url-status=live }}</ref>
|- |-
|Eaglestone
|Janus
| |
|Visual Studio Team Explorer Everywhere
|Windows 2000 ]
|This is the name given to the Teamprise suite Microsoft acquired. The product is now named Visual Studio Team Explorer Everywhere
|Same codename as Windows 3.1.
|<ref>{{cite web
|url=http://blogs.msdn.com/b/bharry/archive/2010/03/04/microsoft-visual-studio-team-explorer-2010.aspx
|title=Microsoft Visual Studio Team Explorer 2010 codename "Eaglestone"
|publisher=Microsoft
|work=Brian Harry's Blog
|access-date=2011-01-02
|archive-date=2010-07-26
|archive-url=https://web.archive.org/web/20100726115715/http://blogs.msdn.com/b/bharry/archive/2010/03/04/microsoft-visual-studio-team-explorer-2010.aspx
|url-status=live
}}</ref><ref>{{cite web |last=Woodward |first=Martin |url=http://www.woodwardweb.com/teamprise/whats_in_a_name.html |title=What's in a Name? - Martin Woodward |work=The Woodward Web |publisher=] |date=2010-03-02 |access-date=2013-06-15 |archive-date=2021-05-07 |archive-url=https://web.archive.org/web/20210507231942/http://www.woodwardweb.com/teamprise/whats_in_a_name.html |url-status=live }}</ref>
|- |-
|KittyHawk
|Odyssey
| |
|]
|N/A
|RAD tool aimed at non-programmers
|Never released.
|<ref>{{cite web
|url=http://www.drdobbs.com/windows/microsofts-kittyhawk-rad-tool-takes-flig/226500208
|title=Microsoft's 'KittyHawk' RAD Tool Takes Flight
|last=Bridgwate
|first=Adrian
|work=Dr. Dobb's: The World of Software Development
|publisher=]
|date=August 3, 2010
|access-date=2010-08-25
|archive-date=2016-04-09
|archive-url=https://web.archive.org/web/20160409112133/http://www.drdobbs.com/windows/microsofts-kittyhawk-rad-tool-takes-flig/226500208
|url-status=live
}}</ref><ref>{{cite web|last1=Foley|first1=Mary Jo|title=Microsoft's LightSwitch: Building business apps for Web, PCs and cloud|url=https://www.zdnet.com/article/microsofts-lightswitch-building-business-apps-for-web-pcs-and-cloud/|website=]|publisher=]|date=3 August 2010|access-date=15 October 2016|archive-date=5 May 2021|archive-url=https://web.archive.org/web/20210505124750/http://www.zdnet.com/article/microsofts-lightswitch-building-business-apps-for-web-pcs-and-cloud/|url-status=live}}</ref>
|- |-
|Rainier
|Whistler
| |
|]
|]
|Named for ], a volcanic mountain peak visible from the Seattle area (where Microsoft is based)
|Merge of Neptune and Odyssey. Named after ], where design retreats were held.
|<ref name="code-magazine.com">{{cite web
|url=http://www.code-magazine.com/Article.aspx?quickid=1006081
|title=Reflections on a Decade of Visual Studio
|work=Code Magazine
|publisher=EPS Software
|access-date=2011-01-02
|archive-date=2013-09-09
|archive-url=https://web.archive.org/web/20130909022234/http://code-magazine.com/Article.aspx?quickid=1006081
|url-status=live
}}</ref>
|- |-
|Everett
|Mantis
| |
|] |]
|Named after the town ], in Washington state
|<ref name="code-magazine.com"/><ref name="Fernandez D. (2003)">{{cite web
|url=http://blogs.msdn.com/b/danielfe/archive/2003/09/18/51839.aspx
|title=Product Names: Everett, Whidbey, Orcas
|publisher=Microsoft
|work=Dan Fernandez's Blog
|last=Dan
|first=Fernandez
|date=September 18, 2003
|access-date=2011-01-02
|archive-date=2012-10-23
|archive-url=https://web.archive.org/web/20121023185058/http://blogs.msdn.com/b/danielfe/archive/2003/09/18/51839.aspx
|url-status=live
}}</ref><ref name="Microsoft Codenames">{{cite web
|url=http://www.dnjonline.com/articles/backend/codenames.asp
|title=Microsoft Codenames
|publisher=Matt Publishing
|access-date=2011-01-02
|archive-date=2010-04-13
|archive-url=https://web.archive.org/web/20100413121644/http://www.dnjonline.com/articles/backend/codenames.asp
|url-status=live
}}</ref>
|-
|Whidbey<ref name="Microsoft Codenames"/>
|
|]
|Named after ] in the Puget Sound<ref name="code-magazine.com" /><ref name="Fernandez D. (2003)" />
| |
|- |-
|Orcas
|Freestyle
| |
|]
|] 1.0
|Named after ] in the Puget Sound
|<ref name="code-magazine.com" /><ref name="Fernandez D. (2003)" /><ref name="Microsoft Codenames"/>
|-
|Camano
|Microsoft Test and Lab Manager
|Microsoft Test Manager, a part of ] ], Premium and Ultimate editions
|Named after ] in the Puget Sound
|<ref>{{cite web |url=http://elegantcode.com/2007/12/11/introducing-microsoft-camano/ |title=Introducing Microsoft Camano |first=David |last=Starr |date=2007-12-11 |work=Elegant Code |publisher=] |access-date=2013-09-06 |archive-url=https://web.archive.org/web/20140408224248/http://elegantcode.com/2007/12/11/introducing-microsoft-camano/ |archive-date=2014-04-08 |url-status=dead }}</ref><ref>{{cite web |url=http://blogs.msdn.com/b/charles_sterling/archive/2008/11/05/visual-studio-team-system-2010-test-features-walk-through-with-screen-shots.aspx |title=Visual Studio Team System 2010 Test Features walk through with screen shots |first=Charles |last=Sterling |date=2008-11-05 |work=Ozzie Rules Blogging |publisher=] |access-date=2013-09-06 |archive-date=2014-04-08 |archive-url=https://web.archive.org/web/20140408215414/http://blogs.msdn.com/b/charles_sterling/archive/2008/11/05/visual-studio-team-system-2010-test-features-walk-through-with-screen-shots.aspx |url-status=live }}</ref><ref>{{cite web |url=http://blogs.msdn.com/b/jasonz/archive/2009/05/12/announcing-microsoft-test-and-lab-manager.aspx |title=New Name for Test and Lab Tools |first=Jason |last=Zander |work=Jason Zander's blog |publisher=] |date=2009-05-12 |access-date=2013-09-06 |archive-date=2010-06-22 |archive-url=https://web.archive.org/web/20100622063324/http://blogs.msdn.com/b/jasonz/archive/2009/05/12/announcing-microsoft-test-and-lab-manager.aspx |url-status=live }}</ref>
|-
|Rosario
|
|] (formerly Team System or Team Suite)
| |
|<ref>{{cite web |url=http://www.microsoft.com/presspass/press/2008/sep08/09-29vs10pr.mspx |title=Microsoft Unveils Next Version of Visual Studio and .NET Framework |publisher=Microsoft |work=News Center |access-date=2011-01-02 |archive-date=2009-08-15 |archive-url=https://web.archive.org/web/20090815083038/http://www.microsoft.com/presspass/press/2008/sep08/09-29VS10PR.mspx |url-status=live }}</ref>
|- |-
|Cider
|Harmony
| |
|{{N/A}}
|Windows XP Media Center Edition 1.5
|Visual Studio designer for building ] applications, meant to be used by application developers
|<ref>{{cite web |url=http://blogs.msdn.com/b/jaimer/archive/2009/10/23/what-is-new-in-wpf-and-cider-on-the-net-framework-4-and-vs2010-beta-2-release.aspx |title=What is new in WPF and Cider on the .NET Framework 4 and VS2010 beta 2 release |work=] |publisher=] |date=23 October 2009 |access-date=August 22, 2013 |first=Jaime |last=Rodriguez |archive-date=5 August 2013 |archive-url=https://web.archive.org/web/20130805032242/http://blogs.msdn.com/b/jaimer/archive/2009/10/23/what-is-new-in-wpf-and-cider-on-the-net-framework-4-and-vs2010-beta-2-release.aspx |url-status=live }}</ref>
|-
|Monaco
| |
|Monaco Editor
|In-browser IDE for Visual Studio. Monaco powers ].
|<ref>{{cite web|last1=Yegulalp|first1=Serdar|title=Microsoft reinvents Visual Studio as an Azure cloud service|url=http://www.infoworld.com/article/2609774/cloud-computing/microsoft-reinvents-visual-studio-as-an-azure-cloud-service.html|website=]|publisher=]|access-date=23 August 2015|date=14 November 2013|archive-date=29 March 2021|archive-url=https://web.archive.org/web/20210329144709/https://www.infoworld.com/article/2609774/microsoft-reinvents-visual-studio-as-an-azure-cloud-service.html|url-status=live}}</ref><ref>{{cite web |title=Monaco Editor |url=https://microsoft.github.io/monaco-editor/index.html |publisher=] |website=] |access-date=24 March 2017 |archive-date=12 December 2021 |archive-url=https://web.archive.org/web/20211212193340/https://microsoft.github.io/monaco-editor/index.html |url-status=live }}</ref>
|}

===.NET Framework family===
{| class="sortable wikitable"
|- |-
!Codename
|Whistler Server
!Final name
|Windows .NET Server
!Notes
|]
!Ref
|One of many unrelated Microsoft projects of the time to carry a ".NET" designation. See: ].
|- |-
|Astoria
|Bobcat
|]
|Enables the creation and consumption of ] services for the web
|<ref>{{cite web|title=ADO.NET Data Services CTP Released! - Data - Site Home - MSDN Blogs|url=http://blogs.msdn.com/b/data/archive/2007/12/10/ado-net-data-services-ctp-released.aspx|access-date=5 December 2012|archive-date=22 May 2011|archive-url=https://web.archive.org/web/20110522092422/http://blogs.msdn.com/b/data/archive/2007/12/10/ado-net-data-services-ctp-released.aspx|url-status=live}}</ref>
|-
|Atlas
|]
|An implementation for ] of Ajax native to ] 2.0
|<ref>{{cite web |url=http://www.developerfusion.com/article/84337/microsoft-atlas-8211-the-ajax-extension-to-aspnet-20 |title=Microsoft Atlas - the AJAX extension to ASP.NET 2.0 |work=Developer Fusion |publisher=Developer Fusion Ltd |date=28 June 2010 |access-date=August 22, 2013 |first=Vikram |last=Srivatsa |archive-date=10 April 2016 |archive-url=https://web.archive.org/web/20160410100632/http://www.developerfusion.com/article/84337/microsoft-atlas-8211-the-ajax-extension-to-aspnet-20 |url-status=dead }}</ref>
|-
|Avalon
|]
|Graphical subsystem released as part of .NET Framework 3.0
|<ref>{{cite web |url=http://www.codeproject.com/Articles/13993/WPF-Avalon-Demo-1 |title=WPF ("Avalon") Demo 1 |work=CodeProject.com |publisher=CodeProject |date=2 May 2006 |access-date=August 22, 2013 |first=A. |last=Gharighi |archive-date=16 July 2021 |archive-url=https://web.archive.org/web/20210716104218/https://www.codeproject.com/Articles/13993/WPF-Avalon-Demo-1 |url-status=live }}</ref>
|-
|Fusion
|{{N/A}}
|.NET Framework subsystem for locating and loading assemblies, including ] management
|<ref>{{cite web |title=Using the .NET Fusion API to Manipulate the GAC |url=http://www.developer.com/net/cplus/article.php/3641491/Using-the-NET-Fusion-API-to-Manipulate-the-GAC.htm |work=developer.com |publisher=Quinstreet Enterprise |date=2006-11-03 |access-date=2013-10-17 |archive-date=2016-04-09 |archive-url=https://web.archive.org/web/20160409030319/http://www.developer.com/net/cplus/article.php/3641491/Using-the-NET-Fusion-API-to-Manipulate-the-GAC.htm |url-status=live }}</ref><ref>{{cite web |url=http://msdn.microsoft.com/en-us/library/ms404523.aspx |title=Fusion (Unmanaged API Reference) |work=MSDN Library |access-date=2013-10-17 |publisher=Microsoft |archive-date=2016-05-30 |archive-url=https://web.archive.org/web/20160530175619/https://msdn.microsoft.com/en-us/library/ms404523.aspx |url-status=live }}</ref>
|-
|Hailstorm
|]
| |
|<ref>{{cite news |url=http://www.codemag.com/Article/0205061 |title=Introducing .NET My Services |last=Egger |first=Markus |publisher=EPS Software |work=Code Magazine |issue=May/June 2002 |access-date=9 January 2018 |archive-date=12 January 2018 |archive-url=https://web.archive.org/web/20180112100838/http://www.codemag.com/Article/0205061 |url-status=live }}</ref>
|Windows Server 2003 Small Business Edition
|-
|Indigo
|]
|An application programming interface (API) in .NET Framework for building connected, service-oriented applications
|<ref>{{cite web|title=Introducing Indigo: An Early Look|date=11 May 2010 |url=http://msdn.microsoft.com/en-us/library/aa480188.aspx|access-date=19 October 2011|archive-date=7 September 2018|archive-url=https://web.archive.org/web/20180907010104/https://msdn.microsoft.com/en-us/library/aa480188.aspx|url-status=live}}</ref>
|-
|Jolt
|] 1.0
| |
|<ref>{{cite book|last1=Jeremy|first1=Likness|title=Designing Silverlight Business Applications|date=28 March 2012|publisher=]|isbn=9780132885904|page=344|url=https://books.google.com/books?id=Q95VQqAUmDAC&pg=PT344|quote=Silverlight runtime contains some classes from named ''Jolt'' from its earliest days}}</ref>
|- |-
|Lightning, Project 42
|]
|] 1.0
|Project Lightning was the original codename for the Common Language Runtime in 1997. The team was based in building 42, hence Project 42.
|<ref name="jayroxe">{{cite web | url=http://www.code-magazine.com/Article.aspx?quickid=0501091 | title=Jay Roxe interview | date=January 2005 | access-date=2006-07-23 | first=Carl | last=Franklin | work=Code Magazine | publisher=EPS Software | archive-date=2013-09-09 | archive-url=https://web.archive.org/web/20130909083726/http://code-magazine.com/Article.aspx?quickid=0501091 | url-status=live }}</ref><ref name="project42">{{cite web | url=http://www.theage.com.au/articles/2003/02/17/1045330514779.html | title=How .Net-work drew sceptics | date=February 18, 2003 | access-date=2006-07-23 | first=Eric | last=Wilson | work=] | archive-date=2016-04-23 | archive-url=https://web.archive.org/web/20160423154413/http://www.theage.com.au/articles/2003/02/17/1045330514779.html | url-status=live }}</ref>
|-
|Project 7
|{{N/A}}
|Early program to recruit implementors of both commercial and academic languages to target the Common Language Runtime. 7 was a prime factor of 42, metaphorizing the relationship between Project 7 and Project 42 (see above).
|<ref name=smh1>{{cite news|last=Wilson|first=Eric|title=How .Net-work drew sceptics|url=http://www.smh.com.au/articles/2003/02/17/1045330514779.html|access-date=31 October 2011|newspaper=The Sydney Morning Herald|archive-date=12 January 2018|archive-url=https://web.archive.org/web/20180112174528/http://www.smh.com.au/articles/2003/02/17/1045330514779.html|url-status=live}}</ref>
|-
|]
|]
|Open-source project that exposes programmatic access to compilers via corresponding APIs
|<ref>{{cite web | url=http://blogs.msdn.com/b/ericlippert/archive/2010/12/16/hiring-for-roslyn.aspx | title=Hiring for Roslyn | date=December 2010 | access-date=2011-07-18 | first=Eric | last=Lippert | archive-date=2011-09-18 | archive-url=https://web.archive.org/web/20110918104911/http://blogs.msdn.com/b/ericlippert/archive/2010/12/16/hiring-for-roslyn.aspx | url-status=live }}</ref><ref>{{cite web | url=http://codebetter.com/patricksmacchia/2010/05/31/c-5-and-meta-programming/ | title=C# 5 and meta-programming | date=May 2010 | access-date=2011-07-18 | first=Patrick | last=Smacchia | archive-date=2011-08-06 | archive-url=https://web.archive.org/web/20110806100700/http://codebetter.com/patricksmacchia/2010/05/31/c-5-and-meta-programming/ | url-status=live }}</ref><ref>{{cite web | url=http://tirania.org/blog/archive/2010/Apr-27.html | title=Mono's C# Compiler as a service on Windows | date=April 2010 | access-date=2011-07-18 | first=Miguel | last=de Icaza | archive-date=2020-11-09 | archive-url=https://web.archive.org/web/20201109003335/https://tirania.org/blog/archive/2010/Apr-27.html | url-status=live }}</ref><ref>{{cite web | url=https://techcrunch.com/2014/04/03/microsoft-extends-its-net-framework-with-new-compiler-platform-and-language-features/ | title=Microsoft Extends Its .NET Framework With New Compiler Platform And Language Features | date=2014-04-03 | access-date=2015-05-10 | archive-date=2020-11-30 | archive-url=https://web.archive.org/web/20201130061918/https://techcrunch.com/2014/04/03/microsoft-extends-its-net-framework-with-new-compiler-platform-and-language-features/ | url-status=live }}</ref>
|}

===Languages===
{{More citations needed section|date = January 2016}}
{| class="sortable wikitable"
|-
!Codename
!Final name
!Notes
!Ref
|-
|Clarity
|] (LINQ)
|LINQ Language extensions to expose query syntax natively to languages such as ] and C#
|{{Citation needed|date=June 2024}}
|-
|D
|M
|Modelling language
|{{Citation needed|date=June 2024}}
|-
|Jakarta
|]
|Named after the capital of Indonesia, ]
| |
|N/A
|Not released yet (as of ] ]). Named after a bar in the ] resort; initially planned as an "interim release" between "Whistler" and "Blackcomb".
|- |-
|]
|]
|Microsoft Design language
|A ]-based ]
|<ref>*{{cite book|author=Adam Freeman|year=2012|title=Metro Revealed|publisher=apress|isbn=9781430244882}}</ref>
|}

===Others===
{| class="sortable wikitable"
|-
!Codename
!Final name
!Notes
!Ref
|-
|Godot
|]
|Named after the play '']'' (centered around the endless wait for a man named "Godot" who never comes), because it was felt to be long overdue.
|<ref>{{cite web | url=http://www.siao2.com/2005/02/12/371650.aspx | title=Why/how MSLU came to be, and more | date=February 12, 2005 | access-date=2006-07-23 | first=Michael | last=Kaplan | work=Sorting It All Out | publisher=] | archive-date=2014-08-12 | archive-url=https://archive.today/20140812020456/http://www.siao2.com/2005/02/12/371650.aspx | url-status=live }}</ref>
|-
|]
|{{N/A}}
|A developer toolset for building multi-tier web applications
|<ref>{{cite web|last=Schwarz|first=Michael|title=Volta - Microsoft Live Labs|url=http://weblogs.asp.net/mschwarz/archive/2008/01/03/volta-microsoft-live-labs.aspx|work=Michael's Blog|publisher=Neudesic|access-date=6 May 2014|date=3 January 2008|archive-date=7 May 2014|archive-url=https://web.archive.org/web/20140507002854/http://weblogs.asp.net/mschwarz/archive/2008/01/03/volta-microsoft-live-labs.aspx|url-status=live}}</ref>
|-
|Project Centennial
|Desktop App Converter
|Allows developers to re-package existing desktop apps into the ] format of ] and sell them in ].
|<ref>{{Cite web|url=https://arstechnica.com/information-technology/2016/09/desktop-apps-make-their-way-into-the-windows-store/|title=Desktop apps make their way into the Windows Store|last=Bright|first=Peter|date=14 September 2016|website=]|publisher=]|access-date=14 June 2017|archive-date=14 September 2016|archive-url=https://web.archive.org/web/20160914180943/https://arstechnica.com/information-technology/2016/09/desktop-apps-make-their-way-into-the-windows-store/|url-status=live}}</ref><ref>{{Cite web|url=https://www.microsoft.com/en-us/download/details.aspx?id=51691|title=Desktop App Converter Preview (Project Centennial)|date=27 May 2016|website=Download Center|publisher=]|access-date=15 September 2016|archive-date=18 February 2017|archive-url=https://web.archive.org/web/20170218184257/https://www.microsoft.com/en-us/download/details.aspx?id=51691|url-status=live}}</ref>
|}

==Gaming hardware==
{| class="sortable wikitable"
|-
!Codename
!Final name
!Notes
!Ref
|-
|DirectX Box
|]
| |
|<ref>{{cite web|last1=Karmali|first1=Luke|title=Rejected Names for the Original Xbox Revealed|url=http://www.ign.com/articles/2013/07/08/rejected-names-for-the-original-xbox-revealed|website=]|publisher=]|date=6 July 2013|access-date=16 June 2016|archive-date=31 August 2021|archive-url=https://web.archive.org/web/20210831072129/https://www.ign.com/articles/2013/07/08/rejected-names-for-the-original-xbox-revealed|url-status=live}}</ref>
|N/A
|Not released yet (as of January 2005). Named after the ] resort ("Whistler" was also a codename, see above).
|- |-
|Natal
! colspan="4" style="background: #f9f9f9; text-align: left;" | ''Others''
|]
|Motion sensitive control system.
|<ref>{{cite web |url=http://www.pcworld.com/article/166027/future_controller_wars_natal_vs_ps3.html |title=Future Controller Wars: Natal vs PS3 |newspaper=] |publisher=] |first=Ian |last=Paul |date=3 June 2009 |access-date=22 February 2011 |archive-date=8 January 2011 |archive-url=https://web.archive.org/web/20110108131158/http://www.pcworld.com/article/166027/future_controller_wars_natal_vs_ps3.html |url-status=dead }}</ref><ref>{{cite web |url=https://www.usatoday.com/tech/gaming/2010-06-14-vidgame14_ST_N.htm |title=Microsoft Kinect gets into motion as E3 confab kicks off |work=] |first=Mike |last=Snider |date=14 June 2010 |access-date=22 February 2011 |archive-date=16 March 2012 |archive-url=https://web.archive.org/web/20120316140618/http://www.usatoday.com/tech/gaming/2010-06-14-vidgame14_ST_N.htm |url-status=live }}</ref>
|- |-
|Xenon
|Quartz
|]
|ActiveMovie
| Successor to the original Xbox.
|]
|<ref>{{cite web |title=The Xbox Xenon? |url=https://www.engadget.com/2004/06/05/the-xbox-xenon/ |work=] |publisher=] |first=Peter |last=Rojas |date=5 June 2004 |access-date=5 August 2012 |archive-date=10 February 2017 |archive-url=https://web.archive.org/web/20170210221034/https://www.engadget.com/2004/06/05/the-xbox-xenon/ |url-status=live }}</ref>
|-
|Durango
|]
|Successor to Xbox 360.
|<ref>{{cite web |title=Next-gen Xbox 'Durango' codename accidentally confirmed by Crytek? |url=https://www.theverge.com/gaming/2012/2/28/2830897/next-gen-xbox-durango-codename-accidentaly-confirmed-by-crytek |work=] |publisher=] |first=Griffin |last=McElroy |date=28 February 2012 |access-date=13 August 2012 |archive-date=24 August 2012 |archive-url=https://web.archive.org/web/20120824075935/http://www.theverge.com/gaming/2012/2/28/2830897/next-gen-xbox-durango-codename-accidentaly-confirmed-by-crytek |url-status=live }}</ref>
|-
|Edmonton
| Xbox One S
| Xbox One with 4K and HEVC Support.
|<ref>{{cite web |title=Xbox One Slim Announced, Out This August |url=https://kotaku.com/xbox-one-slim-announced-out-this-august-update-1781845089 |work=] |publisher=] |first=Jason |last=Schreier |date=13 June 2016 |access-date=26 June 2020 |archive-date=20 July 2021 |archive-url=https://web.archive.org/web/20210720070823/https://kotaku.com/xbox-one-slim-announced-out-this-august-update-1781845089 |url-status=live }}</ref>
|-
|Scorpio
|]
|Upgrade to Xbox One, announced at ] 2016. Announced to have 6 ] GPU and 8-core CPU.
|<ref>{{cite web|last1=Warren|first1=Tom|title=Xbox One X is Microsoft's next game console, arriving on November 7th for $499|url=https://www.theverge.com/2017/6/11/15774918/microsoft-xbox-one-x-release-date-price-new-console-announced-e3-2017|website=]|publisher=]|date=11 June 2017|access-date=12 June 2017|archive-date=12 June 2017|archive-url=https://web.archive.org/web/20170612004033/https://www.theverge.com/2017/6/11/15774918/microsoft-xbox-one-x-release-date-price-new-console-announced-e3-2017|url-status=live}}</ref>
|-
|Scarlett
|]
|Project name for a family of next-gen consoles. Xbox Anaconda and Xbox Lockhart are both part of Project Scarlet. Announced by ] at ].
|<ref>{{cite web|last1=Hempel|first1=Jessi|title=Next-Gen Xbox Consoles Codenamed 'Scarlet,' Claim Multiple Sources|url=https://www.ign.com/videos/2018/06/10/full-microsoft-press-conference-e3-2018/|website=]|publisher=]|date=18 December 2018|access-date=19 December 2018|archive-date=27 April 2020|archive-url=https://web.archive.org/web/20200427135208/https://www.ign.com/videos/2018/06/10/full-microsoft-press-conference-e3-2018|url-status=live}}</ref>
|-
|Anaconda
|]
|Successor to ]. Higher end model. Announced by Microsoft at ]. Later called "Starkville"<ref name=":2">{{Cite web |last=Warren |first=Tom |date=2023-09-19 |title=This is Microsoft's new disc-less Xbox Series X design with a lift-to-wake controller |url=https://www.theverge.com/2023/9/19/23880111/microsoft-xbox-series-x-new-design-refresh |access-date=2023-09-19 |website=The Verge |language=en-US}}</ref>
|<ref name="Windows Central" />]
|-
|Lockhart
|]
|Potential lower end model for a cheaper price. Was announced by Microsoft in September 2020. Would be successor to ]. Later called "Edith".<ref name=":2" />
|<ref name="Windows Central">{{cite web|last1=Corden|first1=Jez|title=Xbox codenames, everything (we think) we know.|url=https://www.windowscentral.com/xbox-scarlett|publisher=Windows Central|date=5 April 2019|access-date=6 May 2019|archive-date=18 June 2020|archive-url=https://web.archive.org/web/20200618233507/https://www.windowscentral.com/xbox-scarlett|url-status=live}}</ref>
|-
|Ellewood
|]
|Codename for the Xbox Series S - 1TB Digital Edition console.
|<ref name=":2" />
|-
|Brooklin
|]
|Codename for the Xbox Series X - 2TB Galaxy Black Special Edition console.
|<ref name=":2" />
|-
|Edinburgh
| |
|Originally spotted by software developer bllyhlbrt on Twitter, a new codename, Xbox Edinburgh, can be seen within the Xbox One's operating system, underneath Lockhart and Anaconda.
|<ref>{{Cite web|last=Moore-Colyer|first=Roland|title=Xbox Series X could launch alongside surprise 'Edinburgh' console|url=https://www.tomsguide.com/news/xbox-edinburgh-codename-hints-xbox-series-x-wont-launch-alone|date=3 July 2020|access-date=2020-07-16|website=Tom's Guide|language=en|archive-date=2021-01-16|archive-url=https://web.archive.org/web/20210116085453/https://www.tomsguide.com/news/xbox-edinburgh-codename-hints-xbox-series-x-wont-launch-alone|url-status=live}}</ref>
|}

==]==
{{More citations needed section|date = January 2016}}
{| class="sortable wikitable"
|- |-
!Codename
|Darwin
!Preliminary name
|Microsoft Installer
!Final name
|]
!Notes
!Ref
|-
|Albany
| |
|]
|Microsoft's all-in-one, subscription-based service for office, communication, and security software
|<ref>{{Cite web |url=http://www.microsoft.com/presspass/press/2008/jul08/07-02equiptpr.mspx |title=Microsoft Launches Consumer Subscription Offering That Combines Microsoft Office and Windows Live OneCare |website=] |access-date=2011-05-06 |archive-date=2012-02-23 |archive-url=https://web.archive.org/web/20120223005310/http://www.microsoft.com/presspass/press/2008/jul08/07-02EquiptPR.mspx |url-status=live }}</ref>
|- |-
|Bandit
|Godot
| |
|] |] 1.0
|Microsoft's first ]
|.
|{{Citation needed|date=June 2024}}
|-
|Barney
|
|Money 1.0
|Microsoft's personal finance software (Flintstones theme)
|{{Citation needed|date=June 2024}}
|-
|Betty
|
|Money 2.0
|{{Citation needed|date=June 2024}}
|
|-
|Budapest
|
|]
|{{Citation needed|date=June 2024}}
|
|-
|Bullet
|
|] 3.0
|Microsoft's first ]-based email product written in-house
|{{Citation needed|date=June 2024}}
|-
|Cirrus
|
|] 1.0
|
|{{Citation needed|date=June 2024}}
|-
|CRM V1.0, Tsunami
|
|] 1.0
|The platform was initially codenamed Tsunami, but once the decision was made to make it an actual product it was just changed to the initials as the initials were enough of a codename.
|<ref name="MS Dynamic CRM">{{Cite web |url=http://blogs.msdn.com/crm/archive/2006/08/28/728400.aspx |title=Microsoft Dynamics CRM Team Blog : CRM Code Names - A Brief History |access-date=2007-08-20 |archive-date=2008-01-02 |archive-url=https://web.archive.org/web/20080102060151/http://blogs.msdn.com/crm/archive/2006/08/28/728400.aspx |url-status=live }}</ref>
|-
|Danube Phase I
|
|] 1.2
|
|<ref name="MS Dynamic CRM" />
|-
|Danube Phase II
|
|] 3
|
|<ref name="MS Dynamic CRM" />
|-
|Dino
|
|Microsoft Money 3.0
|
|{{Citation needed|date=June 2024}}
|-
|Kilimanjaro
|Titan
|] 4
|Was originally Kilimanjaro but changed to Titan, as Kilimanjaro was too difficult to spell
|<ref name="MS Dynamic CRM" />
|-
|Deco
|
|]
|
|{{Citation needed|date=June 2024}}
|-
|Greenwich
|Real-Time Communications Server 2003
|] 2003
|
|{{Citation needed|date=June 2024}}
|-
|Istanbul
|
|]
|
|{{Citation needed|date=June 2024}}
|-
|Maestro
|
|Microsoft Office Business Scorecard Manager 2005
|
|{{Citation needed|date=June 2024}}
|-
|Opus
|
|] v1.0 for Windows 2.x
|
|{{Citation needed|date=June 2024}}
|-
|Oslo
|Microsoft BizTalk Server SOA, SQL Server Modeling CTP
|{{N/A}}
|Set of ] (SOA) technologies
|<ref>{{cite web |last=De la Torre Llorente |first=César |title=Model-Driven SOA with "Oslo" |url=http://msdn.microsoft.com/en-us/architecture/aa699436.aspx |work=MSDN Architecture Center |publisher=Microsoft |access-date=7 December 2012 |date=September 2009 |archive-date=27 October 2012 |archive-url=https://web.archive.org/web/20121027064111/http://msdn.microsoft.com/en-us/architecture/aa699436.aspx |url-status=live }}</ref><ref name="future 0f SSM">{{cite web |url=http://blogs.msdn.com/b/modelcitizen/archive/2010/09/22/update-on-sql-server-modeling-ctp-repository-modeling-services-quot-quadrant-quot-and-quot-m-quot.aspx |title=Update on SQL Server Modeling CTP (Repository/Modeling Services, "Quadrant" and "M") |work=Model Citizen blog |publisher=Microsoft |first=Kraig |last=Brockschmidt |date=22 September 2010 |access-date=7 December 2012 |archive-date=4 December 2012 |archive-url=https://web.archive.org/web/20121204165437/http://blogs.msdn.com/b/modelcitizen/archive/2010/09/22/update-on-sql-server-modeling-ctp-repository-modeling-services-quot-quadrant-quot-and-quot-m-quot.aspx |url-status=live }}</ref><ref>{{cite web|title=SQL Server Modeling CTP - Nov 2009 Release 3 (formerly "Oslo")|url=http://www.microsoft.com/en-us/download/details.aspx?id=24113|work=Download Center|publisher=Microsoft|access-date=7 December 2012|date=20 April 2010|archive-date=23 March 2016|archive-url=https://web.archive.org/web/20160323234018/http://www.microsoft.com/en-us/download/details.aspx?id=24113|url-status=live}}</ref>
|-
|Ren, Stimpy
|Wren
|]
|"Stimpy" was merged into "Ren", which later became "Wren". "Ren" and "Stimpy" are references to ], characters of an American animated television series. "Wren", a homophone of "Ren", is a reference to ], the architect of ].
|<ref>{{cite web|url=https://blogs.msdn.microsoft.com/oldnewthing/20140506-00/?p=1063|title=Letting the boss think your project is classier than it really is|last=Chen|first=Raymond|date=6 May 2014|website=The Old New Thing|publisher=]|access-date=23 January 2016|archive-date=18 February 2019|archive-url=https://web.archive.org/web/20190218143015/https://blogs.msdn.microsoft.com/oldnewthing/20140506-00/?p=1063|url-status=live}}</ref>
|-
|Rigel
|
|Skype Room Systems
|A meeting room system designed to interface with Skype
|<ref>{{Cite news|url=https://www.nojitter.com/post/240172239/skype-for-business-rooms-the-rigel-effect--logitechs-smartdock|title=Skype for Business Rooms: the Rigel Effect & Logitech's SmartDock|access-date=2018-06-04|archive-date=2017-12-31|archive-url=https://web.archive.org/web/20171231001612/http://www.nojitter.com/post/240172239/skype-for-business-rooms-the-rigel-effect--logitechs-smartdock|url-status=live}}</ref>
|-
|Tahiti
|Microsoft SharedView
|{{N/A}}
|A screen sharing tool which allows users to take over sessions and interact with remote desktops. No audio or conference facilities.
|<ref>{{cite web
|url = https://connect.microsoft.com/site94/Surveys
|title = Microsoft SharedView
|work = ]
|publisher = Microsoft Corporation
|access-date = 22 December 2010
|url-status = dead
|archive-url = https://web.archive.org/web/20110101191514/http://connect.microsoft.com/site94/Surveys
|archive-date = 1 January 2011
}}</ref><ref>{{cite web
|url = http://www.zdnet.com/blog/microsoft/a-microsoft-code-name-a-day-tahiti/643
|title = A (Microsoft) Code Name a Day: Tahiti
|work = ]
|publisher = CBS Interactive
|date = 14 August 2007
|access-date = 22 December 2010
|first = Mary Jo
|last = Foley
|archive-date = 7 May 2014
|archive-url = https://web.archive.org/web/20140507003340/http://www.zdnet.com/blog/microsoft/a-microsoft-code-name-a-day-tahiti/643
|url-status = dead
}}</ref>
|-
|Tahoe
|
|SharePoint Portal Server 2001
|
|
|-
|Utopia
|
|]
|Intended to be a user-friendly GUI
|<ref>{{cite web
|url = https://technet.microsoft.com/en-us/magazine/2008.07.windowsconfidential.aspx
|title = Raymond Chen discusses Microsoft Bob
|work = ]
|first = Raymond
|last = Chen
|publisher = Microsoft Corporation
|access-date = 30 December 2012
|archive-date = 21 August 2016
|archive-url = https://web.archive.org/web/20160821224220/https://technet.microsoft.com/en-us/magazine/2008.07.windowsconfidential.aspx
|url-status = live
}}</ref>
|} |}


==Other codenames==
{{compu-stub}}
{{More citations needed section|date = January 2016}}
{| class="sortable wikitable"
|-
!Codename
!Preliminary name
!Final name
!Notes
!Ref
|-
|Acropolis
|
|{{N/A}}
|Application framework for Smart Clients
|{{Citation needed|date=June 2024}}
|-
|Aero Diamond
|
|{{N/A}}
|Used during the ] to describe a set of advanced user interface effects for the ] to be introduced after Vista's release
|<ref>{{Cite web |url=http://www.istartedsomething.com/20070130/interview-tjeerd-ces2007/#aerodiamond |title=Interview with Tjeerd Hoek, director of user experience design for Windows - istartedsomething<!-- Bot generated title --> |date=29 January 2007 |access-date=2007-02-17 |archive-date=2021-06-02 |archive-url=https://web.archive.org/web/20210602173259/https://www.istartedsomething.com/20070130/interview-tjeerd-ces2007/#aerodiamond |url-status=live }}</ref>
|-
|Alexandria
|
|]
|An online music store
|{{Citation needed|date=June 2024}}
|-
|Argo
|
|]
|A digital media player
|{{Citation needed|date=June 2024}}
|-
|Atlanta
|
|{{N/A}}
|A ] that monitors ] deployments
|<ref name="softpedia">{{cite web |url=http://news.softpedia.com/news/Introducing-Codename-Atlanta-Cloud-Monitoring-of-SQL-Server-Deployments-169846.shtml |title=Introducing Codename Atlanta - Cloud Monitoring of SQL Server Deployments |first=Marius |last=Oiaga |date=December 1, 2010 |access-date=2010-12-04 |work=] |publisher=SoftNews |archive-date=2016-04-10 |archive-url=https://web.archive.org/web/20160410074045/http://news.softpedia.com/news/Introducing-Codename-Atlanta-Cloud-Monitoring-of-SQL-Server-Deployments-169846.shtml |url-status=live }}</ref>
|-
|Baraboo
|
|]
|
|<ref>{{cite magazine|last1=Hempel|first1=Jessi|title=Project HoloLens: Our Exclusive Hands-On With Microsoft's Holographic Goggles|url=https://www.wired.com/2015/01/microsoft-hands-on/|magazine=]|publisher=]|date=21 January 2015|access-date=19 June 2017|archive-date=17 May 2017|archive-url=https://web.archive.org/web/20170517233311/https://www.wired.com/2015/01/microsoft-hands-on/|url-status=live}}</ref>
|-
|]
|
|{{N/A}}
|An online content-authoring platform centered around the concept of distributed ] (OLE) and meant to be an alternative to HTML. The developer tools were originally released in beta and some titles were made available on ] before it was scrapped in favor of web development around ] and ] and the designer was refashioned into ].
|{{Citation needed|date=June 2024}}
|-
|Concur
|
|{{N/A}}
|Aims to: define higher-level abstractions (above "threads and locks"); for today's imperative languages; that evenly support the range of concurrency granularities; to let developers write correct and efficient concurrent applications; with much latent parallelism; that can be efficiently mapped to the user's.
|{{Citation needed|date=June 2024}}
|-
|Dallas
|
|{{N/A}}
|Aims to help discover, purchase and manage, premium data subscriptions in the Windows Azure platform
|<ref>{{Cite web |url=http://www.microsoft.com/WindowsAzure/dallas/ |title=Microsoft Codename "Dallas" |website=] |access-date=2010-04-13 |archive-date=2010-10-06 |archive-url=https://web.archive.org/web/20101006133347/http://www.microsoft.com/WindowsAzure/dallas/ |url-status=live }}</ref>
|-
|Dorado
|
|]
|
|{{Citation needed|date=June 2024}}
|-
|Eldorado
|
|]
|Program to recognize alumni of Microsoft's Most Valuable Professional award program when they left the program in good standing or were not re-awarded.
|<ref>{{Cite web |url=https://mvp.microsoft.com/en-us/MVPReconnectSearch |title=MVP Reconnect members |website=] |access-date=2023-05-19 |archive-date=2023-05-18 |archive-url=https://web.archive.org/web/20230518155108/https://mvp.microsoft.com/en-us/MVPReconnectSearch |url-status=live }}</ref>
|-
|HailStorm
|
|]
|Collection of ] centered around the storage and retrieval of information. Cancelled before it could fully materialize.
|<ref name="HailStormIntroduction">{{cite web |url=https://msdn.microsoft.com/en-us/library/bb263932%28v=vs.85%29.aspx |title=A Quick Introduction to HailStorm |last=Hess |first=Robert |date=May 14, 2001 |publisher=] |work=] |access-date=May 5, 2015 |archive-date=February 14, 2018 |archive-url=https://web.archive.org/web/20180214014604/https://msdn.microsoft.com/en-us/library/bb263932(v=vs.85).aspx |url-status=live }}</ref><ref name="NYTimes2">{{cite web |url=https://www.nytimes.com/2002/04/11/technology/ebusiness/11NET.html |title=Microsoft Has Shelved Its Internet 'Persona' Service |last=Markoff |first=John |date=April 11, 2002 |work=] |access-date=May 5, 2015 |archive-date=August 2, 2016 |archive-url=https://web.archive.org/web/20160802205934/http://www.nytimes.com/2002/04/11/technology/ebusiness/11NET.html |url-status=live }}</ref>
|-
|Honolulu
|
|]
|
|{{Citation needed|date=June 2024}}
|-
|Ibiza
|
|Azure Portal
|Website for managing cloud resources
|<ref>{{cite web
| url = https://azure.microsoft.com/en-us/blog/announcing-azure-portal-general-availability/
| title = Announcing Azure Portal general availability
| last = Welicki
| first = Leon
| date = 2015-12-02
| website = Microsoft Azure Blog
| publisher = Microsoft
| access-date = 2023-08-17
| quote = We are excited to announce that as of today, portal.azure.com (codename Ibiza), has achieved general availability (GA) status
| archive-date = 2023-02-13
| archive-url = https://web.archive.org/web/20230213054933/https://azure.microsoft.com/en-us/blog/announcing-azure-portal-general-availability/
| url-status = live
}}</ref>
|-
|Kratos
|
|PowerApps
|Software for building and sharing native, mobile, and Web apps
|<ref>{{cite web
| url = https://www.zdnet.com/article/microsoft-takes-wraps-off-powerapps-mobile-app-creation-service/
| title = Microsoft takes wraps off PowerApps mobile-app creation service
| last = Foley
| first = Mary Jo
| author-link = Mary Jo Foley
| date = 2015-11-30
| website = ZDNet
| publisher = CBS Interactive
| access-date = 2016-11-13
| quote = PowerApps -- codenamed Project Kratos -- is designed to allow business users and developers to create custom native, mobile, and Web apps that can be shared simply across their organizations.
| archive-date = 2021-02-28
| archive-url = https://web.archive.org/web/20210228160847/https://www.zdnet.com/article/microsoft-takes-wraps-off-powerapps-mobile-app-creation-service/
| url-status = live
}}</ref>
|-
|Kumo
|
|]
|Microsoft's set of features improving ] search engine
|{{Citation needed|date=June 2024}}
|-
|Marvel
|
|]
|The classic version of MSN, originally as a proprietary, "walled garden" online service
|{{Citation needed|date=June 2024}}
|-
|Media2Go
|
|Windows Mobile software for ]s
|Platform built on ] found on ]s
|<ref> {{webarchive|url=https://web.archive.org/web/20071229055011/http://www.microsoft.com/presspass/press/2003/jan03/01-09M2GLaunchPR.mspx |date=2007-12-29 }}</ref><ref>{{Cite web |url=http://www.microsoft.com/presspass/press/2003/oct03/10-27abocomtatungpr.mspx |title=Microsoft Announces Official Name and New ODM Partners For Portable Media Center Devices |website=] |access-date=2007-04-10 |archive-date=2010-08-28 |archive-url=https://web.archive.org/web/20100828164627/http://www.microsoft.com/presspass/press/2003/oct03/10-27AboComTatungPR.mspx |url-status=live }}</ref>
|-
|Metro
|
|] (XPS)
|Named after ], a wireless prepaid service in the United States.{{Citation needed|date=July 2022}}
|{{Citation needed|date=June 2024}}
|-
|Milan
|Surface
|]
|Table-top style computer with multi-touch touchscreen interface
|{{Citation needed|date=June 2024}}
|-
|Mira
|
|{{N/A}}
|Windows CE .NET-based technology for ]s
|<ref>{{Cite web |url=http://www.microsoft.com/presspass/press/2002/jan02/01-07freestylemirapr.mspx |title=Microsoft Unveils New Home PC Experiences With "Freestyle" and "Mira": New Technologies |website=] |access-date=2006-07-22 |archive-date=2011-12-05 |archive-url=https://web.archive.org/web/20111205183537/http://www.microsoft.com/presspass/Press/2002/Jan02/01-07FreestyleMiraPR.mspx |url-status=live }}</ref><ref>{{Cite web |url=http://www.microsoft.com/windows/smartdisplay/howitworks.mspx |title=How a Smart Display Works |website=] |access-date=2006-07-22 |archive-date=2009-09-07 |archive-url=https://web.archive.org/web/20090907191637/http://www.microsoft.com/windows/smartdisplay/howitworks.mspx |url-status=live }}</ref>
|-
|Monaco
|
|{{N/A}}
|Music-making program similar to ] ] application
|<ref>{{Cite web|url = https://www.zdnet.com/article/a-microsoft-code-name-a-day-monaco/|title = A (Microsoft) code name a day: Monaco|date = 13 December 2006|website = ]|publisher = ]|last = Foley|first = Mary Jo|author-link = Mary Jo Foley|access-date = 26 April 2015|archive-date = 8 May 2021|archive-url = https://web.archive.org/web/20210508113627/https://www.zdnet.com/article/a-microsoft-code-name-a-day-monaco/|url-status = live}}</ref>
|-
|Origami
|
|]
|
|{{Citation needed|date=June 2024}}
|-
|Palladium
|Trusted Windows
|{{N/A}}
|Effort to develop a small, very secure operating environment within Windows, including curtained memory, trusted input, and graphics. Project renamed to ], and was never fully implemented.
|<ref name="TheBigSecret">{{cite web |url=http://www.newsweek.com/big-secret-145809 |title=The Big Secret |last=Levy |first=Steven |author-link=Steven Levy |date=June 24, 2002 |work=] |access-date=January 30, 2015 |archive-date=June 24, 2020 |archive-url=https://web.archive.org/web/20200624182651/https://www.newsweek.com/big-secret-145809 |url-status=live }}</ref><ref name="TrustedWindows">{{cite web |url=http://download.microsoft.com/download/a/f/c/afcf8195-0eda-4190-a46d-aa60b45e0740/Security.ppt |title=Privacy, Security, and Content in Windows Platforms |last3=England |first3=Paul |last2=Peinado |first2=Marcus |last1=Biddle |first1=Peter |date=2000 |format=PPT |publisher=] |access-date=January 30, 2015 |archive-url=https://web.archive.org/web/20150402134130/http://download.microsoft.com/download/a/f/c/afcf8195-0eda-4190-a46d-aa60b45e0740/Security.ppt |archive-date=April 2, 2015 |url-status=dead }}</ref>
|-
|Softsled
|
|{{N/A}}
|Software based ]{{Clarify|post-text=Is it "software-based" or "software based on"?|date=December 2012}}
|{{Citation needed|date=June 2024}}
|-
|Springfield
|]
|{{N/A}}
|Website in Alpha testing stage providing mashup and webpages creation tools, with publishing as ] option
|<ref>{{Cite news
|url = http://www.zdnet.com/blog/microsoft/microsoft-popfly-yahoo-pipes-for-the-rest-of-us/452
|title = Microsoft Popfly: Yahoo Pipes for the rest of us
|work = ]
|publisher = CBS Interactive
|date = 18 May 2007
|access-date = 22 December 2010
|first = Mary Jo
|last = Foley
|archive-date = 14 July 2013
|archive-url = https://web.archive.org/web/20130714072356/http://www.zdnet.com/blog/microsoft/microsoft-popfly-yahoo-pipes-for-the-rest-of-us/452
|url-status = dead
}}</ref>
|-
|Sydney
|Bing Chat
|]
|
|<ref>{{Cite web |title=Chatbots keep going rogue, as Microsoft probes AI-powered Copilot that's giving users bizarre, disturbing, even harmful messages |url=https://fortune.com/2024/02/28/microsoft-investigating-harmful-ai-powered-chatbot/ |access-date=2024-09-18 |website=Fortune |language=en}}</ref>
|-
|Wolverine
|
|] stack for ]
|Named after the ], a character from ].
|<ref>{{cite journal|last1=Noss|first1=John|journal=]|date=2 January 1995|volume=16|number=52|page=51|issn=0199-6649|title=Big bang for the buck|url=https://books.google.com/books?id=gDgEAAAAMBAJ&q=Microsoft+wolverine&pg=PA51|access-date=21 October 2020|archive-date=9 March 2022|archive-url=https://web.archive.org/web/20220309141235/https://books.google.com/books?id=gDgEAAAAMBAJ&q=Microsoft+wolverine&pg=PA51|url-status=live}}</ref>
|}

==References==
{{Reflist|30em|refs=
<ref name="Codename tracker">{{cite web|last=Foley |first=Mary Jo |title=All About Microsoft: CodeTracker A monthly look at Microsoft's codenames and what they reveal about the direction of the company. |url=http://i.techrepublic.com.com/downloads/Kaelin/CodeTracker-July2011.pdf |work=] |publisher=] |access-date=30 October 2011 |archive-url=https://web.archive.org/web/20111031111707/http://i.techrepublic.com.com/downloads/Kaelin/CodeTracker-July2011.pdf |archive-date=31 October 2011 |url-status=dead }}</ref>
}}

==External links==
*


]
]
]
]

Latest revision as of 01:50, 27 December 2024

Microsoft codenames are given by Microsoft to products it has in development before these products are given the names by which they appear on store shelves. Many of these products (new versions of Windows in particular) are of major significance to the IT community, and so the terms are often widely used in discussions before the official release. Microsoft usually does not announce a final name until shortly before the product is publicly available. It is not uncommon for Microsoft to reuse codenames a few years after a previous usage has been abandoned.

There has been some suggestion that Microsoft may move towards defining the real name of their upcoming products earlier in the product development lifecycle to avoid needing product codenames.

Operating systems

Windows 3.x and 9x

Codename Preliminary name Final name Notes Ref
Janus — Windows & MS-DOS 5 Combined bundle of Windows 3.1 and MS-DOS 5. Janus is a Roman god usually depicted with two faces, here symbolizing the previously separate Windows and MS-DOS products.
Jastro — Windows & MS-DOS 6 Combined bundle of Windows 3.1 and MS-DOS 6. Portmanteau of Janus and Astro, the codename of MS-DOS 6.
Sparta, Winball Windows 3.1 Plus Windows for Workgroups 3.1 Windows 3.1 (16-bit) with enhanced networking; designed to work particularly well as a client with the new Windows NT.
Snowball — Windows for Workgroups 3.11 An updated version of Windows for Workgroups 3.1, which introduces 32-bit file access and network improvements. It also removes the Standard Mode, effectively dropping support for 16-bit x86 processors.
Chicago Windows 4.0, Windows 93, Windows 94 Windows 95 For codenames of some of the internal components of Windows 95, see "Jaguar", "Cougar", "Panther" and "Stimpy" under § OS components
Detroit — USB Supplement to Windows 95 OSR2 Named after Detroit, Michigan. A writer for Maximum PC suggested that "Detroit" and other Windows 95-era names were answers to the question posed by Microsoft's "Where do you want to go today?" marketing campaign.
Nashville Windows 96 Dropped Named after Nashville. Cancelled upgrade for Windows 95; sometimes referred to in the press as Windows 96. Codename was reused for Internet Explorer 4.0 and Windows Desktop Update which incorporated many of the technologies planned for Nashville.
Memphis Windows 97 Windows 98 —
Millennium — Windows Me ME stands for Millennium Edition; Microsoft states that it is pronounced Me.

Windows NT family

Codename Preliminary name Final name Notes Ref
Razzle NT OS/2, Advanced Windows Windows NT 3.1 Is also the name of a script that sets up the Windows NT development environment. NT OS/2 reflected the first purpose of Windows NT to serve as the next version of OS/2, before Microsoft and IBM split up. Microsoft used the NT OS/2 code to release Windows NT 3.1.
Daytona — Windows NT 3.5 Named after the Daytona International Speedway in Daytona Beach, Florida.
Cairo — Dropped A cancelled project that would have fulfilled Bill Gates' "Information at your fingertips" vision
Shell Update Release — Windows NT 4.0 —
Wolfpack — Microsoft Cluster Server —
Janus — Dropped Codename for the proposed 64-bit edition of Windows 2000, which was never released.
Impala — Windows NT 4.0 Embedded —
Neptune — Dropped Planned to be the first consumer-oriented release of Windows NT succeeding the Windows 9x series; merged with Odyssey to form Whistler.
Triton — Dropped A planned minor update to "Neptune".
Asteroid Windows 2000 Service Pack 1
Odyssey — Dropped Planned to be a successor to Windows 2000; merged with Neptune to form Whistler.
Whistler Windows 2002 Windows XP Named after Whistler Blackcomb, where design retreats were held.
Mantis — Windows XP Embedded Named after the Mantis shrimp.
Freestyle — Windows XP Media Center Edition —
Harmony — Windows XP Media Center Edition 2004 —
Symphony — Windows XP Media Center Edition 2005 —
Slalom Longhorn Media Center Edition Dropped Longhorn was gonna have a Media Center edition but when Longhorn turned into Vista, the plan was scrapped and instead the Media Center application was available in Home Premium and Ulimate editions.
Emerald — Windows XP Media Center Edition 2005 Update Rollup 2 —
Diamond — Windows Media Center Included with Windows Vista.
Springboard — — Set of enhanced security features, included in Windows XP Service Pack 2.
Lonestar — Windows XP Tablet PC Edition 2005 —
Whistler Server Windows 2002 Server,
Windows .NET Server,
Windows .NET Server 2003 		Windows Server 2003 —
Bobcat — Windows Small Business Server 2003 Not to be confused with Microsoft Bob.
Eiger, Mönch — Windows Fundamentals for Legacy PCs Mönch included additional features for use on mobile devices.
Longhorn — Windows Vista Named after the Longhorn Bar in the Whistler Blackcomb ski resort; initially planned as a "minor release" between "Whistler" and "Blackcomb" (see below)
Blackcomb, Vienna — Dropped The purported successor to Whistler, and later, Longhorn. Named after Whistler Blackcomb, where design retreats were held. Blackcomb was later renamed to Vienna in January 2006, named after the capital of Austria. Eventually cancelled due to scope creep and replaced with Windows 7.
Q, Quattro — Windows Home Server —
Vail — Windows Home Server 2011 —
Longhorn Server — Windows Server 2008 —
Cougar — Windows Small Business Server 2008 —
Centro — Windows Essential Business Server Named after the Spanish translation of the word "center".
Windows 7 — Windows 7 The number 7 comes from incrementing the internal version number of Windows Vista (6.0) by one. Often incorrectly referred to as Blackcomb or Vienna, while the codenames actually refer to an earlier Vista successor project that was cancelled due to scope creep.
Windows Server 7 — Windows Server 2008 R2 —
Fiji Windows Vista Media Center Feature Pack 2008 Windows Media Center TV Pack 2008 Named after the country of Fiji.
Cascades Windows Essential Business Server "v2" Windows Essential Business Server 2008 R2 (cancelled) Originally intended as the successor of Windows Essential Business Server 2008 but was cancelled "due to external factors".
Aurora — Windows Small Business Server 2011 Essentials —
Quebec — Windows Embedded Standard 7 Named after the province of Quebec
Windows 8 — Windows 8 Often incorrectly referred to as Jupiter, Midori and Chidori. Jupiter is the application framework used to create "immersive" apps for Windows 8, and Midori was a separate, managed code operating system. (see below)
Windows Server "8" — Windows Server 2012 —
Blue — Windows 8.1 —
Windows Server Blue — Windows Server 2012 R2 —
Threshold Windows 8.2, Windows 9 Windows 10
Windows 10 November Update 		Named after a location seen in Halo: Combat Evolved, near which Installation 04 orbits.
Redstone — Windows Server 2016
Windows 10 Creators Update
Windows 10 Fall Creators Update
Windows 10 April 2018 Update
Windows Server 2019 		Named after a fictional mineral from Minecraft.
Santorini Windows 10X Dropped Named after an island in Greece. Originally supposed to be a new OS to be released mid-late 2021, was eventually cancelled. Some of its features were integrated into Windows 11 and other products.
Sun Valley — Windows 11 Named after Sun Valley, Idaho.
Hudson Valley — Un­known A possibly-planned version of Windows scheduled to be released in 2025. Named after Hudson Valley, New York

Windows platform engineering milestones

The following are code names used for internal development cycle iterations of the Windows core, although they are not necessarily the code names of any of the resulting releases. With some exceptions, the semester designations usually matches the Windows version number.

Codename Semester Release Notes Ref
Titanium 19H1 Windows 10 May 2019 Update Named after the chemical element in the periodic table.
Vanadium 19H2 Windows 10 November 2019 Update Named after the chemical element in the periodic table.
Vibranium 20H1 Windows 10 May 2020 Update
Windows 10 October 2020 Update
Windows 10 May 2021 Update
Windows 10 November 2021 Update
Windows 10 2022 Update 		Named after the fictional metal Vibranium in Marvel Comics as continuing the previous line of chemical elements with Chromium could have caused confusion with the web browser project.
Manganese 20H2 — Named after the chemical element in the periodic table.
Iron 21H1 Windows Server 2022 Named after the chemical element in the periodic table.
Cobalt 21H2 Windows 11 Named after the chemical element in the periodic table.
Nickel 22H2 Windows 11 2022 Update Named after the chemical element in the periodic table. Originally planned to be the 22H1 semester, although that semester was ultimately skipped and Nickel shifted to 22H2, expanded to span the entire year.
Copper 23H1 — Named after the chemical element in the periodic table.
Zinc 23H2 Windows Server, version 23H2 Named after the chemical element in the periodic table.
Gallium 24H1 — Named after the chemical element in the periodic table.
Germanium 24H2 Windows 11 2024 Update
Windows Server 2025 		Named after the chemical element in the periodic table.
Dilithium 25H1 — Named after the fictional material from Star Trek.
  1. ^ Builds of these semesters were only released via the Windows Insider program.
  2. Windows Server 2022 reports as version 21H2, although it is in fact based on the earlier Iron codebase.

Windows CE family

Codename Preliminary name Final name Ref
Pegasus, Alder — Windows CE 1.0
Birch — Windows CE 2.0
Cedar — Windows CE 3.0
Talisker Windows CE .NET Windows CE 4.0
Jameson — Windows CE 4.1
McKendric — Windows CE 4.2
Macallan — Windows CE 5.0
Yamazaki Windows CE 6.0 Windows Embedded CE 6.0
Chelan Windows Embedded CE 7 Windows Embedded Compact 7

Windows Mobile

Codename Preliminary name Final name Ref
Rapier — Pocket PC 2000
Merlin — Pocket PC 2002
Ozone — Windows Mobile 2003
Magneto — Windows Mobile 5
Crossbow — Windows Mobile 6
6 on 6 — Windows Mobile 6.1.4
Titanium — Windows Mobile 6.5
Maldives Windows Mobile 7 Windows Phone 7

Windows Phone

Codename Preliminary name Final name Ref
Photon Windows Mobile 7 Series Windows Phone 7
Mango — Windows Phone 7.5
Apollo — Windows Phone 8
Blue — Windows Phone 8.1
Threshold — Windows 10 Mobile

Others

Codename Preliminary name Final name Notes Ref
Singularity — — Experimental operating system based on the Microsoft .NET platform, using software-based type safety as a replacement for hardware-based memory protection. Evolved into Midori.
Midori — — A managed code operating system being developed by Microsoft with joint effort of Microsoft Research.
Red Dog Windows Cloud Azure Microsoft cloud services platform
Tahiti — — Supposedly a family of multi-core technologies including an operating system, applications and development tools designed to make better use of today's multi-core CPUs. Midori may be a part of this suite of new Microsoft technologies.
Tokyo Azure AD Cloud App Discovery Cloud App Discovery Azure-based data-directory service designed to help connect the right people to the right data.
Zurich — .NET Services Part of Microsoft Azure, Microsoft's cloud computing platform, that focuses on extended software development based on .NET Framework to the cloud.

OS components

Codename Preliminary name Final name Notes Ref
Anaheim — Microsoft Edge A rewrite of Microsoft's web browser, based on the Chromium project.
Barcelona — Windows Defender Application Guard A security feature for running the Microsoft Edge web browser inside a virtual machine, thus isolating it from the rest of the system in the event that it was hacked.
Beihai Paint 3D 3D version of Microsoft Paint
Code Integrity Rooting Secure Startup BitLocker A security feature that checks and validates the integrity of Windows boot and system components.
Continuum Tablet Mode Continuum A Windows 10 feature that enables hybrid devices to switch between tablet mode and desktop mode. An immediately manifest effect is the Start screen getting maximized in tablet mode.
Cornerstone Secure Startup BitLocker Full disk encryption feature introduced in Windows Vista and present in subsequent versions that utilizes the Trusted Platform Module to perform integrity checking prior to operating system startup.
Assistant — Cortana An intelligent personal assistant included with Windows 10, named after an artificial intelligence character in Halo
Cougar — VMM32 32-bit kernel
Darwin Microsoft Installer Windows Installer A Windows service and application programming interface for installing software on computers running Microsoft Windows operating systems
Frosting — Microsoft Plus! for Windows 95
Hydra — Terminal Services, Windows Terminal Server Terminal Server adds "multiheading" support to Windows (the ability to run multiple instances of the graphics subsystem), and the hydra is a mythological monster with multiple heads.
Jaguar — — 16-bit DOS kernel for Windows 95 based on MS-DOS 5.0, used by Windows 95 boot loader and compatibility layer.
Jupiter — WinRT XAML A new application framework on Windows 8 used to create cross-platform "immersive" apps.
Monad MSH, Microsoft Shell Windows PowerShell "Monads", according to philosopher Gottfried Leibniz's monadology, are the ultimate elements of the universe, individual percipient beings, and MSH is similarly composed of small, individual modules the user puts in interrelation.
Morro — Microsoft Security Essentials MSE was codenamed after the Morro de São Paulo beach in Brazil.
Neon — Fluent Design Microsoft Fluent Design System is a revamp of the Windows UI based around five key components: Light, Depth, Motion, Material, and Scale.
O'Hare — Internet Explorer 1 Internet Explorer 1, first shipped in Microsoft Plus! for Windows 95: The codename O'Hare ties into the Chicago codename for Windows 95: O'Hare International Airport is the largest airport in the city of Chicago, Illinois — in Microsoft's words, "a point of departure to distant places from Chicago".
Panther — — Cancelled. Panther was a 32-bit kernel based on Windows NT kernel.
Pinball — High Performance File System (HPFS) "Pinball" is the nickname (as opposed to a codename) for HPFS because HPFS driver in Windows NT 3.5 is called PINBALL.SYS.
Piton — ReadyDrive Feature introduced in Windows Vista to support hybrid drives
Protogon — ReFS The successor of NTFS
Rincon — Internet Explorer 7 Rincon is a surfing beach in Puerto Rico
Spartan — Microsoft Edge Web browser first introduced in Windows 10, which uses EdgeHTML rendering engine. Refers to Spartans in Halo.
Stimpy — Windows Shell Applies to Windows 95 only.
Viridian — Hyper-V Virtualization update for Windows Server 2008
WinFS — — A cancelled data storage and management system project based on relational databases, first demonstrated in 2003 as an advanced storage subsystem for the Microsoft Windows, designed for persistence and management of structured, semi-structured as well as unstructured data.
Cascadia — Windows Terminal A terminal emulator for Windows 10.

Microsoft Servers

SQL Server family

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Codename Final name Notes Ref
SQLNT SQL Server 4.21
SQL95 SQL Server 6.0
Hydra SQL Server 6.5
Sphinx SQL Server 7.0
Plato OLAP Services 7.0 "OLAP Services" was later renamed Microsoft Analysis Services
Shiloh SQL Server 2000 Version 8
Rosetta Reporting Services in SQL Server 2000
Yukon SQL Server 2005 Version 9

Picasso Analysis Services in SQL Server 2005
Katmai SQL Server 2008 Version 10

Kilimanjaro SQL Server 2008 R2 Version 10.5
Blue SQL Server 2008 Report Designer 2.0 This is the standalone release of the tool for Reporting Services. It must not be confused with Report Builder 2.0.

Denali SQL Server 2012 Version 11

Juneau SQL Server Data Tools Was included in SQL Server 2012, later released as a standalone downloadable application
Crescent Power View A data visualisation tool that originally shipped as part of SQL Server 2012, later an add-in for Microsoft Excel
SQL14 SQL Server 2014 Version 12
Hekaton SQL Server In-Memory OLTP In-memory database engine built into SQL Server 2014
SQL16 SQL Server 2016 Version 13
Helsinki SQL Server 2017 Version 14

Seattle SQL Server 2019 Version 15
Aris SQL Server Big Data Clusters Announced at Microsoft Ignite 2018 event on September 24–28. Retirement announced for Feb-28 2025
Dallas SQL Server 2022 Version 16. Public preview available for download. Announced at Microsoft Build 2022 event on May 24

Others

Codename Final name Ref
Hermes Microsoft System Management Server 1.0
Catapult Microsoft Proxy Server 1.0
Geneva Active Directory Federation Services
Falcon Microsoft Message Queue Server
Viper Microsoft Transaction Server
Normandy Microsoft's Commercial Internet System (CIS)
Stirling Microsoft Forefront Protection Suite

Developers tools

Visual Studio family

Codename Preliminary name Final name Notes Ref
Thunder Visual Basic 1.0 The first version of Visual Basic. The standard dialogs and controls created by the Visual Basic runtime library all have "Thunder" as a prefix of their internal type names (for example, buttons are internally known as ThunderCommandButton).
Escher Microsoft Visual Basic for MS-DOS
Dolphin Microsoft Visual C++ 2.0
Zamboni Microsoft Visual C++ 4.1 After Zamboni, an ice resurfacing machine.
Boston Microsoft Visual Studio 97 Named for Boston, Massachusetts
Aspen Microsoft Visual Studio 6.0 Named after the popular ski destination Aspen, Colorado
Cassini Web Server ASP.NET Development Server The lightweight local Web server that is launched in Visual Studio in order to test Web projects
Hatteras Visual Studio Team System's Source Control System — Named after the Cape Hatteras Lighthouse in the Outer Banks region of North Carolina
Ocracoke Visual Studio Team System load testing suite — Named after the Ocracoke Island Lighthouse on Ocracoke Island, also in North Carolina
Currituck Team Foundation Work Item Tracking — Named after the Currituck Beach Lighthouse in Corolla, North Carolina
Bodie Team Foundation Server SDK — Named after the Bodie Island Lighthouse in North Carolina
Tuscany Online version of Visual Studio. Currently a research project
Phoenix — A Microsoft research software development kit
Eaglestone Visual Studio Team Explorer Everywhere This is the name given to the Teamprise suite Microsoft acquired. The product is now named Visual Studio Team Explorer Everywhere
KittyHawk Visual Studio LightSwitch RAD tool aimed at non-programmers
Rainier Visual Studio .NET (2002) Named for Mount Rainier, a volcanic mountain peak visible from the Seattle area (where Microsoft is based)
Everett Visual Studio .NET 2003 Named after the town Everett, Washington, in Washington state
Whidbey Visual Studio 2005 Named after Whidbey Island in the Puget Sound
Orcas Visual Studio 2008 Named after Orcas Island in the Puget Sound
Camano Microsoft Test and Lab Manager Microsoft Test Manager, a part of Visual Studio 2010 Test Professional, Premium and Ultimate editions Named after Camano Island in the Puget Sound
Rosario Visual Studio Ultimate 2010 (formerly Team System or Team Suite)
Cider — Visual Studio designer for building Windows Presentation Foundation applications, meant to be used by application developers
Monaco Monaco Editor In-browser IDE for Visual Studio. Monaco powers Visual Studio Code.

.NET Framework family

Codename Final name Notes Ref
Astoria WCF Data Services Enables the creation and consumption of OData services for the web
Atlas ASP.NET AJAX An implementation for ASP.NET of Ajax native to .NET Framework 2.0
Avalon Windows Presentation Foundation Graphical subsystem released as part of .NET Framework 3.0
Fusion — .NET Framework subsystem for locating and loading assemblies, including GAC management
Hailstorm .NET My Services
Indigo Windows Communication Foundation An application programming interface (API) in .NET Framework for building connected, service-oriented applications
Jolt Silverlight 1.0
Lightning, Project 42 .NET Framework 1.0 Project Lightning was the original codename for the Common Language Runtime in 1997. The team was based in building 42, hence Project 42.
Project 7 — Early program to recruit implementors of both commercial and academic languages to target the Common Language Runtime. 7 was a prime factor of 42, metaphorizing the relationship between Project 7 and Project 42 (see above).
Roslyn .NET Compiler Platform Open-source project that exposes programmatic access to compilers via corresponding APIs

Languages

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Codename Final name Notes Ref
Clarity Language Integrated Query (LINQ) LINQ Language extensions to expose query syntax natively to languages such as Visual Basic .NET and C#
D M Modelling language
Jakarta Visual J++ Named after the capital of Indonesia, Jakarta
Metro Microsoft Design language A typography-based design language

Others

Codename Final name Notes Ref
Godot Microsoft Layer for Unicode Named after the play Waiting for Godot (centered around the endless wait for a man named "Godot" who never comes), because it was felt to be long overdue.
Volta — A developer toolset for building multi-tier web applications
Project Centennial Desktop App Converter Allows developers to re-package existing desktop apps into the APPX format of Universal Windows Platform and sell them in Windows Store.

Gaming hardware

Codename Final name Notes Ref
DirectX Box Xbox
Natal Kinect Motion sensitive control system.
Xenon Xbox 360 Successor to the original Xbox.
Durango Xbox One Successor to Xbox 360.
Edmonton Xbox One S Xbox One with 4K and HEVC Support.
Scorpio Xbox One X Upgrade to Xbox One, announced at Electronic Entertainment Expo 2016. Announced to have 6 TFLOPS GPU and 8-core CPU.
Scarlett Xbox Series X|S Project name for a family of next-gen consoles. Xbox Anaconda and Xbox Lockhart are both part of Project Scarlet. Announced by Microsoft at E3 2018.
Anaconda Xbox Series X Successor to Xbox One. Higher end model. Announced by Microsoft at The Game Awards 2019. Later called "Starkville" Xbox Series X|S
Lockhart Xbox Series S Potential lower end model for a cheaper price. Was announced by Microsoft in September 2020. Would be successor to Xbox One S. Later called "Edith".
Ellewood Xbox Series S - 1TB Digital Edition Codename for the Xbox Series S - 1TB Digital Edition console.
Brooklin Xbox Series X - 2TB Galaxy Black Special Edition Codename for the Xbox Series X - 2TB Galaxy Black Special Edition console.
Edinburgh Originally spotted by software developer bllyhlbrt on Twitter, a new codename, Xbox Edinburgh, can be seen within the Xbox One's operating system, underneath Lockhart and Anaconda.

Office software

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Codename Preliminary name Final name Notes Ref
Albany Microsoft Equipt Microsoft's all-in-one, subscription-based service for office, communication, and security software
Bandit Schedule+ 1.0 Microsoft's first Personal Information Manager
Barney Money 1.0 Microsoft's personal finance software (Flintstones theme)
Betty Money 2.0
Budapest Microsoft Office Communicator Web Access 2005
Bullet Microsoft Mail 3.0 Microsoft's first LAN-based email product written in-house
Cirrus Microsoft Access 1.0
CRM V1.0, Tsunami Microsoft CRM 1.0 The platform was initially codenamed Tsunami, but once the decision was made to make it an actual product it was just changed to the initials as the initials were enough of a codename.
Danube Phase I Microsoft CRM 1.2
Danube Phase II Microsoft CRM 3
Dino Microsoft Money 3.0
Kilimanjaro Titan Microsoft CRM 4 Was originally Kilimanjaro but changed to Titan, as Kilimanjaro was too difficult to spell
Deco Microsoft PhotoDraw
Greenwich Real-Time Communications Server 2003 Microsoft Office Live Communications Server 2003
Istanbul Microsoft Office Communicator 2005
Maestro Microsoft Office Business Scorecard Manager 2005
Opus Word for Windows v1.0 for Windows 2.x
Oslo Microsoft BizTalk Server SOA, SQL Server Modeling CTP — Set of Service-oriented architecture (SOA) technologies
Ren, Stimpy Wren Microsoft Outlook "Stimpy" was merged into "Ren", which later became "Wren". "Ren" and "Stimpy" are references to Ren and Stimpy, characters of an American animated television series. "Wren", a homophone of "Ren", is a reference to Christopher Wren, the architect of St Paul's Cathedral.
Rigel Skype Room Systems A meeting room system designed to interface with Skype
Tahiti Microsoft SharedView — A screen sharing tool which allows users to take over sessions and interact with remote desktops. No audio or conference facilities.
Tahoe SharePoint Portal Server 2001
Utopia Microsoft Bob Intended to be a user-friendly GUI

Other codenames

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Codename Preliminary name Final name Notes Ref
Acropolis — Application framework for Smart Clients
Aero Diamond — Used during the development of Windows Vista to describe a set of advanced user interface effects for the Desktop Window Manager to be introduced after Vista's release
Alexandria Zune Marketplace An online music store
Argo Zune A digital media player
Atlanta — A cloud service that monitors Microsoft SQL Server deployments
Baraboo Microsoft HoloLens
Blackbird — An online content-authoring platform centered around the concept of distributed Object Linking and Embedding (OLE) and meant to be an alternative to HTML. The developer tools were originally released in beta and some titles were made available on MSDN before it was scrapped in favor of web development around ASP and ActiveX and the designer was refashioned into Visual InterDev.
Concur — Aims to: define higher-level abstractions (above "threads and locks"); for today's imperative languages; that evenly support the range of concurrency granularities; to let developers write correct and efficient concurrent applications; with much latent parallelism; that can be efficiently mapped to the user's.
Dallas — Aims to help discover, purchase and manage, premium data subscriptions in the Windows Azure platform
Dorado Zune PC Client
Eldorado MVP Reconnect Program to recognize alumni of Microsoft's Most Valuable Professional award program when they left the program in good standing or were not re-awarded.
HailStorm .NET My Services Collection of web services centered around the storage and retrieval of information. Cancelled before it could fully materialize.
Honolulu Windows Admin Center
Ibiza Azure Portal Website for managing cloud resources
Kratos PowerApps Software for building and sharing native, mobile, and Web apps
Kumo Bing Microsoft's set of features improving Live Search search engine
Marvel The Microsoft Network The classic version of MSN, originally as a proprietary, "walled garden" online service
Media2Go Windows Mobile software for Portable Media Centers Platform built on Windows Mobile found on portable media players
Metro XML Paper Specification (XPS) Named after Metro by T-Mobile, a wireless prepaid service in the United States.
Milan Surface Microsoft PixelSense Table-top style computer with multi-touch touchscreen interface
Mira — Windows CE .NET-based technology for smart displays
Monaco — Music-making program similar to Apple GarageBand application
Origami Ultra-Mobile PC
Palladium Trusted Windows — Effort to develop a small, very secure operating environment within Windows, including curtained memory, trusted input, and graphics. Project renamed to Next-Generation Secure Computing Base, and was never fully implemented.
Softsled — Software based Windows Media Center Extender
Springfield Microsoft Popfly — Website in Alpha testing stage providing mashup and webpages creation tools, with publishing as Rich Internet Application option
Sydney Bing Chat Copilot
Wolverine TCP/IP stack for Windows for Workgroups 3.11 Named after the Wolverine, a character from Marvel Comics.

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