| Abbreviation | Definition |
|---|---|
| CIIS | California Institute of Integral Studies |
| CIIS | China Institute of International Studies |
| CIIS | Continental Institute of International Studies |
| CIIT | Coimbatore Institute of Information and Technology |
| CIIT | COMSATS Institute of Information Technology |
| CIJ | Computer Institute of Japan |
| CIJR | Canadian Institute for Jewish Research |
| CIK | Commonwealth Institute of Kentucky |
| CIK | CYRUS Institute of Knowledge |
| CILA | Chartered Institute of Loss Adjusters |
| CILAS | Cairo Institute of Liberal Arts and Sciences |
| CILED | Chartered Institute of Leadership Education and Development |
| CILER | Cooperative Institute for Limnology and Ecosystems Research |
| CILI | Cambridge International Land Institute |
| CILI | Comparative and International Law Institute |
| CILR | Clarence Institute For Learning And Research |
| CILT | Chartered Institute for Logistics and Transport |
| CILT | Chartered Institute Of Logistics And Transport |
| CILT | Chartered Institute Of Logistics Transport |
| CILV | Cosmetology Institute of Las Vegas |