| Abbreviation | Definition |
|---|---|
| CIFAR | Cooperative Institute For Alaska Research |
| CIFC | Connecticut Institute For Communities |
| CIFE | Carlow Institute of Further Education |
| CIFE | Central Institute of Fisheries Education |
| CIFS | Coastal Institute Of Forensic Science |
| CIFS | Cornell Institute for Food Systems |
| CIFT | CommodityOnline Institute of Financial Training |
| CIG | Cultural Institutions Group |
| CIGGT | Canadian Institute of Guided Ground Transport |
| CIGI | Canadian International Grains Institute |
| CIHC | Cardinal Institute for Health Careers |
| CIHE | Crown Institute of Higher Education |
| CIHE | Cultural Institute of Health and Education |
| CIHR | Canada Institutes for Health Research |
| CIHS | California Institute for Human Science |
| CIHT | Chartered Institution of Highways and Transportation |
| CII | Cardiovascular Innovation Institute |
| CII | Commercial Industrial Institutional |
| CII | Council of Institutional Investors |
| CIIA | Canadian Institute of International Affairs |