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DSI may refer to:

Abbreviations

• DontStayIn, a social networking website

Airport

• IATA airport code for Destin Executive Airport

Businesses

DSI is an initialism for the following companies:

• Daiichi Sankyo, Incorporated
• Data Sciences International, a company in Saint Paul, United States
• Dave Smith Instruments, an American synthesizer company
• Deep Space Industries, American-based asteroid mining startup
• Deep Springs International
• Delphi Schools, Inc.
• Delphine Software International, a now bankrupt software company
• Destination Software, Inc., a video game company
• Distinctive Software Inc., a video game company
• Diversified Specialty Institute Holdings, Inc., a US-based healthcare group
• Drivetrain Systems International, an Australian automotive transmissions manufacturer
• DYWIDAG Systems International, an international supplier of ground anchors and post-tensioning systems
• State Hydraulic Works (Turkey) (Turkish: Devlet Su İşleri (DSİ)), a state agency in Turkey

Education

• Decision Sciences Institute, a professional association focusing on the application of quantitative research and qualitative research to the decision problems of individuals, organizations, and society.
• Deutsche Schule Istanbul, a private high school in Istanbul

Gaming

• Dead Space Ignition, a video game in the Dead Space series
• Nintendo DSi, Nintendo's third iteration of the Nintendo DS handheld game console

Music

• Dope Stars Inc., an industrial metal band formed in 2002

Organizations and institutions

• Special Intervention Detachment, an Algerian Special Forces Unit of the National gendarmerie for counter-terrorism actions
• Data Storage Institute, a Singaporean national research institute
• Department of Special Investigation, a Thai government organization for special investigation
• Dienst Speciale Interventies, a Dutch government organization for counter-terrorism actions
• DSI Samson Group, a Sri Lankan conglomerate
• Deutsches SOFIA Institut, an institute helping develop SOFIA

Police

• Detective Superintendent

Science, mathematics and medicine

• Depolarization-induced suppression of inhibition, a type of modulation of inhibitory neurotransmission
• Diffused Surface Illumination, a multi-touch technique using a special acrylic Endlighten that disperses even light supplied by edge lighting the acrylic.
• Digital sequence information, information from sequenced DNA and other large molecules such as RNA or proteins, which can be processed digitally.
• The Stuttgart Database of Scientific Illustrators 1450–1950

Technology

• Data storage interrupt, the name used for a segmentation fault on PowerPC-based processors
• Data Stream Interface, computer network protocol to run Apple Filing Protocol over TCP
• Delay slot instruction, a term from computer architecture
• Digital Serial Interface, a protocol for controlling of lighting in buildings
• Display Serial Interface, a serial protocol for mobile display devices
• Diverterless supersonic inlet, a type of jet engine air intake

• Disambiguation pages