| Acronym | Definition |
|---|
| ISGS➣Illinois State Geological Survey |
| ISGS➣International Society for Gesture Studies (University of Texas at Austin) |
| ISGS➣Illinois State Genealogical Society (Springfield, IL) |
| ISGS➣International Society for General Semantics (est. 1943) |
| ISGS➣International Sol-Gel Society (est. 2003) |
| ISGS➣International Society for Gender Studies (Japan) |
| ISGS➣Integrated Starter/Generator System |
| ISGS➣Internet Stained Glass Supply (Sierra Stained Glass Studios, Inc; Modesto, CA) |