| Abbreviation | Definition |
|---|---|
| CICTT | CAST/ICAO Common Taxonomy Team |
| CICU | Chamber of Industrial Commercial Understandings |
| CIEE | Chinese Institute of Electrical Engineering |
| CIF | Canadian Institute of Forestry |
| CIF-IFC | Canadian Institute of Forestry - Institut Forestier du Canada |
| CIF-IFC | Canadian Institute of Forestry | Institut Forestier du Canada |
| CIFST | Canadian Institute of Food Science and Technology |
| CIFST-ICSTA | Canadian Institute of Food Science and Technology - Institut Canadien de Science et Technologie Alimentaires |
| CIG-ACSG | Canadian Institute of Geomatics-Association canadienne des science g??omatiques |
| CIG-ACSG | Canadian Institute of Geomatics-Association canadienne des science géomatiques |
| CIHM | Cambay Institute of Hospitality Management |
| CII | Chartered Insurance Institute |
| CII | Construction Industry Institute |
| CILIP | Chartered Institute of Library and Information Professionals |
| CIMA | Cellulose Insulation Manufacturers Association |
| CIMA | Chicago Interactive Marketing Association |
| CIMB | Construction Industry Management Board |
| CIMF | Centre for International Macroeconomics and Finance |
| CIMR | Caisse Interprofessionnelle Marocaine De Retraite |
| CIMS | Coalition of Independent Music Stores |