| Abbreviation | Definition |
|---|---|
| CIGGT | Canadian Institute of Guided Ground Transport |
| CIGI | Canadian International Grains Institute |
| CIHC | Canadian Industrial Heritage Centre |
| CIHC | Canadian Interprofessional Health Collaborative |
| CIHI | Canadian Institute for Health Information |
| CIHM | Canadian Institute for Historical Microreproductions |
| CIHM | Canadian Institute of Hydrocarbon Measurement |
| CIHR | Canada Institutes for Health Research |
| CIHR | Canadian Institutes of Health Research |
| CIIA | Canadian Institute of International Affairs |
| CIIDRC | Canada International Internet Dispute Resolution Centre |
| CIIDRC | Canadian International Internet Dispute Resolution Center |
| CIIDRC | Canadian International Internet Dispute Resolution Centre |
| CIIM | Canadian Institute for Identities and Migration |
| CIIN | Canadian Institutional Investment Network |
| CIIP | Canadian Immigrant Integration Program |
| CIIP | Canadian International Innovation Program |
| CIJC | Canadian Intercollegiate Judging Competition |
| CIJR | Canadian Institute for Jewish Research |
| CIM | Canadian Institute of Mining |