| Abbreviation | Definition |
|---|---|
| ICEC | International Cost Engineering Council |
| ICES | International Cake Exploration Societe |
| ICFS | Conseil International d'Études Francophones |
| ICFS | Conseil International d'tudes Francophones |
| ICFS | International Council for Francophone Studies |
| ICGM | Canadian Institute of Marine Engineering |
| ICGM | Institut Canadien de Génie Maritime |
| ICGM | Institut Canadien de Gnie Maritime |
| ICGS | Ingham County Genealogical Society |
| ICGS | International Corporate Governance Society |
| ICGS | Ionia County Genealogical Society |
| IChemE | Institution of Chemical Engineers |
| ICHS | Comit International des Sciences Historiques |
| ICHS | Comité International des Sciences Historiques |
| ICHS | International Committee of Historical Sciences |
| ICHS | Iowa County Humane Society |
| ICHS | Islamabad Cooperative Housing Society |
| ICI | Engineering Institute of Canada |
| ICI | Institiid Ceimice na hireann |
| ICI | Institiúid Ceimice na hÉireann |