| ISGS | I S G S Stained Glass Supplies 
| Others |
| ISGS | Illinois State Genealogical Society
| Others |
| ISGS | Illinois State Geologic Survey
| Others |
| ISGS | Illinois State Geological Survey
| Others |
| ISGS | In situ geochemical stabilization
| Others |
| ISGS | Integrated Sciences for Global Society
| Others |
| ISGS | Inter State Gas Systems
| Others |
| ISGS | International School for Graduate Studies
| Others |
| ISGS | International Society for General Semantics
| Others |
| ISGS | International Society for Gesture Studies
| Others |
| ISGS | International Society for Glaucoma Surgery
| Others |
| ISGS | International Society of Glaucoma Surgery
| Others |
| ISGS | International Sol Gel Society
| Others |
| ISGS | Investigative Security Global Solutions
| Others |
| ISGS | Ischemic Stroke Genetic Study
| Others |
| ISGS | Ischemic Stroke Genetics Study
| Others |
| ISGS | Islamic State in Greater Sahara
| Others |
| ISGS | Islamic State in the Greater
| Others |
| ISGS | Islamic State in the Greater Sahara
| Others |