SDI is a three-letter abbreviation with many expansions. It's impossible to count exactly how many expansions it has, but it's surely one of candidates for the first place.

English language

Less common expansions include:
  • Saratoga Direct Inc.
  • Sarawak Development Institute
  • Scientific Development and Integration
  • Scion Digital Imaging
  • Scuba Diving International
  • Selective Dissemination of Information
  • Serial Data Interface
  • Serial Digital Interface (Broadcast video standard)
  • Service Dimensions Inc.
  • Seoul Development Institute
  • Socratic Dialogue Inducing Lab
  • Software Dynamics, Incorporated
  • Southern Dental Industries Limited
  • Spatial Development Initiatives
  • Space Science and Engineering Center (SSEC) Desktop Ingestor
  • Spatial Data Infrastructure
  • Spatial Data Integrations, Inc.
  • Stamp Dealers International
  • State Disability Insurance
  • Statistics on Depository Institutions
  • Steel Deck Institute
  • Steel Dynamics Inc.
  • Strategic Diagnostics Inc.
  • Strategic Directions International
  • Strategic Distribution, Inc.
  • Strengthening Democratic Institutions Project
  • Sustainable Development Indicators
  • Sustainable Development Information
  • Sustainable Development Initiative
  • Systems by Design of Illinois
  • Systems Documentation, Inc.

Other languages