DSI

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