| Acronym | Definition |
|---|
| ISSG➣Invasive Species Specialist Group (IUCN) |
| ISSG➣International Syria Support Group (est. 2005) |
| ISSG➣Information Systems Services Group (Chesterfield, MO) |
| ISSG➣In-Situ Steam Generation |
| ISSG➣Information Strategy Steering Group |
| ISSG➣Institutional Self-Study Guide (National Collegiate Athletic Association) |
| ISSG➣Internet Services Study Group |
| ISSG➣Illustrated Shipboard Shopping Guide |
| ISSG➣Intelligence Support Steering Group |