SDI
SDI may refer to:
- SCUBA Diving International
- Serial Digital Interface (standard used in professional video equipment)
- Single document interface
- Slum Dwellers International
- Software Development Institute
- Spatial Data Infrastructure
- Standard Drive Interconnect (minicomputer interface standard by DEC)
- State Disability Insurance (as 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 sometimes referred to as SSDI)
- S.D.I. (video game), a computer game and an arcade game
- Silt Density Index (see reverse osmosis systems)
- Socialisti Democratici Italiani, the Italian Democratic Socialists, an Italian political party
- Suction Diesel Injection, a range of diesel engines by the Volkswagen Group for use in cars and vans
- System Deployment Image (Microsoft bootable disk image)
This disambiguation page lists articles associated with the title SDI.
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