'''DSI''' may refer to: {{TOC right}}

== 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 edge lighting * 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

== Other uses == * Dance Club Songs, a former ''Billboard'' chart with the shortcut "DSI"

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