| Acronym | Definition |
|---|
| SGI | Silicon Graphics, Inc. |
| SGI | Soka Gakkai International |
| SGI | Saskatchewan Government Insurance (Canada) |
| SGI | Societa Geografica Italiana (Italian: Italian Geographic Society) |
| SGI | Sanjay Ghodawat Institute (India) |
| SGI | Serious Games Institute (UK) |
| SGI | Silicon Graphics Image (filename extension) |
| SGI | Styling Garage Ingolstadt |
| SGI | Silicon Graphics Image |
| SGI | Silicon Graphics Inc. |
| SGI | Secondary Green Intensity |
| SGI | St George Island |
| SGI | Strategic Growth International (New York, NY) |
| SGI | Sporting Goods Industry |
| SGI | Sharda Group of Institutions (India) |
| SGI | Scientific Games International, Inc. (Alpharetta, GA) |
| SGI | Small-Group Instruction |
| SGI | Sustainable Growth Initiative (various locations) |
| SGI | Services of General Interest (European postal working group) |
| SGI | Sour Gas Injection (oil industry) |
| SGI | St George International (UK school) |
| SGI | Serious Games Initiative |
| SGI | Sunshine in Government Initiative |
| SGI | Strategic Growth Initiative (est. 2002) |
| SGI | Sopra Group India (IT consultancy firm) |
| SGI | Spheroidal Graphite Iron |
| SGI | Students for Genital Integrity |
| SGI | Seoul Guarantee Insurance (Korea) |
| SGI | Scene Genesis, Inc. (est. 1998; Rochester, NY) |
| SGI | Seamless Graphical Interface |
| SGI | Stray Goose International (military veterans' group; Hurlburt Field, FL) |
| SGI | Saringa Group Inc. |
| SGI | Sveriges Gummiindustriförening (Swedish Rubber Industry Federation) |
| SGI | Soybean Genomics and Improvement |
| SGI | Southport Game and Internet (AU) |
| SGI | Sutton Group, Inc. |
| SGI | Stratford Global Intelligence |