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 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 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 Identification Services Bureau, Portuguese abbreviation of Direcção dos Serviços de Identificação
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"