| Abbreviation | Definition |
|---|---|
| ICorr | Institute of Corrosion |
| ICPHS | Conseil International de la Philosophie et des Sciences Humaines |
| ICPHS | International Council for Philosophy and Humanistic Studies |
| ICPS | International Carnivorous Plant Society |
| ICPS | International Cerebral Palsy Society |
| ICRO | International Cell Research Organization |
| ICRO | Organisation Internationale de Recherche sur la Cellule |
| ICRS | International Cannabinoid Research Society |
| ICRS | International Cannabinoid Research Society's |
| ICRS | International Cartilage Repair Society |
| ICS | Industrial Computing Society |
| ICS | International College of Surgeons |
| ICS | Irish Computer Society |
| ICS | Is A Civil Society |
| ICSM | Interventional Cardiovascular Society of Malaysia |
| ICSO | integrated Civil Society Organizations |
| ICSS | International Cell Surgical Society |
| ICSS | International Civil Society Support |
| ICSSPE | Conseil International pour L'Education Physique et la Science du Sport |
| ICSTA | Canadian Institute of Food Science and Technology |