SDI

SDI may refer to:

Companies and organizations

• Scuba Diving International, a SCUBA training and certification agency
• SDI Media Group, an entertainment subtitling and language services company
• Software Design Inc., mainframe systems software house responsible for GRASP, EPAT, UDC, FLEET0
• Slum Dwellers International, manages networks of the urban poor and slum dwellers that are organised into federations
• Socialisti Democratici Italiani, the Italian Democratic Socialists, an Italian political party

Computing

• Single document interface, a type of software application interface
• Software-defined infrastructure, entirely under the control of software with no operator or human intervention
• Spatial data infrastructure, a type of data infrastructure for geographic needs
• Standard Disk Interconnect, a minicomputer interface standard by DEC
• System Deployment Image, a Microsoft file format of an arbitrary disk image

Science and medicine

• Selective dissemination of information, a search task in information retrieval
• Silt density index, a measure for the fouling capacity of water in reverse osmosis systems
• Small diameter implant, a type of dental implant
• Smoke-developed index, a measure of the concentration of smoke a material emits as it burns
• Stand density index, a measure of the stocking of a stand of trees
• Sulfadimidine, an antibiotic

Technology

• SDI (engine), a range of diesel engines by the Volkswagen Group for use in cars and vans
• Serial digital interface, a communication standard used in professional video distribution
• Subsurface drip irrigation, a buried dripperline irrigation system

Video games

• SDI (arcade game), a 1987 shoot 'em up arcade game by Sega
• S.D.I. (video game), a 1986 action adventure game by Cinemaware

Other

• Saidor Airport (IATA code), in Madang Province, Papua New Guinea
• State Disability Insurance, a short-term disability income replacement in California
• Strategic Defense Initiative, American space-based anti-missile project under President Ronald Reagan
• SABR Defensive Index, baseball metric for defense created by the Society for American Baseball Research