SDI

SDI may refer to:

• SDI, also known as MDI, or Mini Dental Implants
• SDI (engine), a range of diesel engines by the Volkswagen Group for use in cars and vans
• SDI (video game) a shoot 'em up by Sega
• S.D.I. (video game), an action adventure game by Cinemaware
• SDI Media Group, an entertainment subtitling and language services company
• Saidor Airport in Papua New Guinea (IATA code SDI)
• Scuba Diving International
• Selective dissemination of information, a search task in Information retrieval
• Serial Digital Interface, a communication standard used in professional video distribution
• Silt Density Index, see reverse osmosis systems
• Single document interface
• Slum Dwellers International
• Smoke-developed index, a measure of the concentration of smoke a material emits as it burns
• Socialisti Democratici Italiani, the Italian Democratic Socialists, an Italian political party
• Software Development Inc, mainframe systems software house responsible for GRASP, EPAT, UDC, FLEET
• Software Development Institute
• Spatial Data Infrastructure
• Spiral Dynamics Integral
• Standard Drive Interconnect, a minicomputer interface standard by DEC
• State Disability Insurance, paid in California, New York State, or New Jersey, in the USA
• Strategic Defense Initiative, U.S. anti-missile project under Ronald Reagan dubbed "Star Wars"
• Subsurface drip irrigation, also referred to as SSDI
• Sulfadimidine, an antibiotic whose abbreviation include SDI
• Sunni Dawat-e-Islami, a Barelvi Sunni Islamic organisation
• System Deployment Image, a Microsoft bootable disk image
• Systemically Dangerous Institutions, financial institutions that are thought to contribute to systemic risk