SDI

SDI is an abbreviation for:

Saidor airport in Saidor, Papua New Guinea after the IATA code
Naturally aspirated diesel with direct injection, naturally aspirated see, designation at Volkswagen for this design
Scuba Diving International, a diving association

Selective Dissemination of Information, an automatic profile service for the permanent monitoring of interesting information, see Alert Service
Serial Digital Interface, an interface for the serial transmission of digital audio and video data
Silt Density Index, a scale for existing in the water colloids
Single Document Interface, a special dialog application in graphical user interfaces
Socialisti Democratici Italiani, Italian Social Democratic Party
Spatial Data Infrastructure, see Spatial Data Infrastructure
Language and Interpretation Institute in Munich, an academy and vocational school
Stand Density Index, a Bestandsdichtemaß in forestry
Strategic Defense Initiative, an announced by U.S. President Ronald Reagan space-based missile defense system from the 1980s
System - dynamic intervention, a model of family constellations

S.D.I. is an abbreviation for:

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