| SGI | Italian Geographical Society 
| Others |
| SGI | Sage Grouse Initiative
| Others |
| SGI | Samalkha Group Of Institutions
| Others |
| SGI | Saskatchewan Government Insurance
| Others |
| SGI | Scientific Geographical Interest
| Others |
| SGI | Secondary Green Intensity
| Others |
| SGI | Security Governance Initiative
| Others |
| SGI | SGISilicon Graphics International
| Others |
| SGI | Should Get Interesting
| Others |
| SGI | Silicon Graphics Image
| Others |
| SGI | Silicon Graphics Image Bitmap graphics
| Others |
| SGI | Silicon Graphics Inc
| Others |
| SGI | Silicon Graphics Inc.
| Others |
| SGI | Silicon Graphics Incorporated
| Others |
| SGI | Silicon Graphics International
| Others |
| SGI | Silicon Graphics, Incorporated
| Others |
| SGI | Slava G Ivanov
| Others |
| SGI | Small-Group Instruction
| Others |
| SGI | Smith Group Inc
| Others |
| SGI | Soka Gakkai International
| Others |
| SGI | Solid Ground, Inc.
| Others |
| SGI | Solid Group Inc
| Others |
| SGI | Solutions for Generating Income
| Others |
| SGI | Southeastern Grasslands Initiative
| Others |
| SGI | Soxware Games Inc
| Others |
| SGI | Soxware Games, Incorporated
| Others |
| SGI | Springville Griffith Institute
| Others |
| SGI | St George Island
| Others |
| SGI | START GROW and IMPROVE
| Others |
| SGI | Stop Growth And Industry
| Others |
| SGI | Styling Garage Ingolstadt
| Others |
| SGI | Success Group International
| Others |
| SGI | Summer Genetics Institute
| Others |
| SGI | Super Game Improvement
| Others |
| SGI | Supernatural Ghost Investigation
| Others |
| SGI | Sustainable Governance Indicators
| Others |
| SGI | Swedish Geotechnical Institute
| Others |
| SGI | Synchronised Group Improvisation
| Others |
| SGI | Synthetic Genomics Inc
| Others |