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AA, Aa, Double A, or Double-A may refer to:

Arts, entertainment and media

• America's Army, a 2002 computer game published by the U.S. Army
• Ancient Anguish, a computer game in existence since 1992
• Aa!, a J-Pop musical group
• Double-A (band), stylised as AA, South Korean boy band
• Aa (album), a 2016 album by Baauer
• AA (song), a 2021 single by Walker Hayes
• Ace Attorney, a series of video games developed by Capcom.
• AA Films, an Indian film distribution company
• AA Book (disambiguation)
• AA, the production code for the 1966 Doctor Who serial The Savages
• Academy Award, in the film industry

Brands, organizations and enterprises

• Alcoholics Anonymous, support organisation
• A. A. Arms, a defunct firearms manufacturer
• Aerolíneas Argentinas, an Argentine airline
• Air Asia, an airline
• Air Austral airline, former logo
• Alcoa, a US aluminum producer, stock symbol
• American Airlines, IATA code
• Anadolu Agency, press agency, Turkey
• Arakan Army, Rakhine State, Myanmar, a rebel group
• Audio-Animatronics, used at Disney Parks
• Academia de Artes, Mexico
• Former US Amalgamated Association of Iron and Steel Workers
• Architectural Association School of Architecture, London, United Kingdom
• Astrological Association of Great Britain, London, UK
• Auswärtiges Amt, the Foreign Office of Germany
• Danish Association of Architects (Akademisk Arkitektforening)
• The AA, UK motoring organization
• AA Ireland, an Irish automotive services company
• AA Motoring Trust, merged into IAM Motoring Trust

Philosophy and religion

• A∴A∴, a spiritual organization created in 1907 by Aleister Crowley
• Abhisamayalankara, or Abhisamaya-alaṅkāra, a Mahayana Buddhist text
• Augustinians of the Assumption, a congregation of Catholic religious (priests and brothers)
• Statue of A'a from Rurutu, a wooden fertility-god sculpture from the Pacific island of Rurutu
• "A is A", an expression of the law of identity: each thing is identical with itself
• Iah, an ancient moon deity
• AA or A.A. (After Adam), year notation in the Mandaean calendar

Language

• aa, Latin-script digraph used in the orthographies of Dutch, Finnish and other languages
• aa, representation of letter Å in several Scandinavian languages
• aa, a romanization of Arabic letter alif ⟨ا⟩
• Ꜳ, an orthographic ligature
• Afar language (ISO 639-1 language code aa)
• Aa (Bengali), a Bengali letter

Measurements

• AA, a bra size
• AA, a width in shoe sizes
• AA battery size

Nature

• Aa (plant), a genus of orchid
• Aa (snail), a subgenus of snail
• ʻAʻā or aa, a form of lava
• A term for "river" in German hydronymy, see Aach (toponymy)

People

• Aa (surname), a Scandinavian surname, including a list of people with this name
• Van der Aa (surname), a Dutch surname, including a list of people with this name
• Aa (architect), an architect in ancient Egypt
• Anthony Armstrong (writer) (1897–1972), Anglo-Canadian writer who used the pseudonym A.A. when writing for Punch
• Allu Arjun (born 1982), Indian actor, often abbreviated as AA in film titles

Places

• Aa, Estonia, a village and beach in Estonia
• Aa, Indonesia, a populated place in the South Sulawesi province of Indonesia
• Albania, LOC MARC code
• Ann Arbor, a city in Michigan, United States of America
• Anne Arundel County, a county in Maryland, United States of America
• Antarctica, WMO country code
• Aruba, FIPS country code

Rivers

Belgium

• Aa (Nete), in the province of Antwerp, tributary of the Nete

France

• Aa (France)

Germany

• Aabach (Afte), formerly Große Aa, North Rhine-Westphalia
• Aa (Möhne), North Rhine-Westphalia
• Aa (Nethe), North Rhine-Westphalia
• Aa (Werre), North Rhine-Westphalia
• Bocholter Aa, North Rhine-Westphalia
• Dreierwalder Aa, North Rhine-Westphalia
• Kleine Aa (Aabach), a tributary of the Aabach in North Rhine-Westphalia
• Große Aa, a tributary of the Ems in Lower Saxony
• Große Aa (Aabach), a tributary of the Aabach in North Rhine-Westphalia
• Münstersche Aa, North Rhine-Westphalia
• Schaler Aa, Lower Saxony and North Rhine-Westphalia
• Speller Aa, Lower Saxony and North Rhine-Westphalia
• Steinfurter Aa, North Rhine-Westphalia

Netherlands

• Aa (Meuse), North Brabant
• Aa of Weerijs, North Brabant
• Drentsche Aa, Drenthe and Groningen
• Ruiten Aa [nl], a river in Westerwolde, Groningen

Switzerland

• Aabach (Aare), a tributary of the Aare, in Aargau canton
• Aabach (Greifensee) or Ustermer Aa, in canton of Zürich
• Aabach (Obersee), a tributary of Obersee (Zürichsee), in canton of St. Gallen
• Aabach (Seetal), in the cantons of Lucerne and Aargau
• Chli Aa (Sempachersee), a tributary of Lake Sempach in the canton of Lucerne
• Engelberger Aa, in the cantons of Obwalden and Nidwalden
• Gross Aa (Sempachersee), a tributary of Lake Sempach in the canton of Lucerne
• Mönchaltorfer Aa, a tributary of Greifensee in canton of Zürich
• Sarner Aa (river), Obwalden, tributary of Lake Lucerne

Latvia

• Gauja, Latvia, formerly known as Livländische Aa
• Lielupe, Latvia, formerly known as Kurländische Aa

Science and technology

• AA amyloidosis
• Aplastic anemia, a disease
• Arachidonic acid, a polyunsaturated fatty acid
• Advanced Architecture, later Amiga Advanced Graphics Architecture
• Atlas Autocode, a computer programming language
• AA, Audible.com file format
• Authoritative Answer bit, in DNS, a flag for a query answer
• AA postulate of Euclidean geometry
• Anti-aircraft, in military use
• Attoampere (aA), 10 Ampere, a unit of electric current
• AA tree in computer science
• Abbreviation for azidoazide azide
• Anna's Archive, search engine for shadow libraries

Sports

• Double-A (baseball) or Class AA, a Minor League Baseball classification level
• American Association (1882–1891), US baseball league
• American Association (1902–1997), US baseball league
• American Association of Professional Baseball, North American baseball league
• Athletics Australia
• Amateur Athletic Union, US, since 1884

Transportation

• AA Highway, Kentucky, US
• Former Ann Arbor Railroad (1895–1976), Ohio and Michigan
• Ann Arbor Railroad (1988), Ohio and Michigan
• Former K line, New York City Subway, formerly "AA"
• NZR A class, a New Zealand locomotive class
• Ascend Airways

Other uses

• Asian Aerospace, an airshow in Asia
• Associate of Arts, an academic degree
• European Union Association Agreement
• Postal abbreviation for United States armed forces in the Americas
• Japanese internet slang for Shift JIS art
• Internet slang for ASCII Art

See also

• AAA (disambiguation)
• Grosse Aa (disambiguation)
• Kleine Aa (disambiguation)
• A Aa, a film
• Automobile Association (disambiguation)

• Disambiguation pages