| Abbreviation | Definition |
|---|---|
| CIAR | Cooper Institute For Aerobics Research |
| CIAS | Christian Institute of Arts and Sciences |
| CIAS | Christian Institute of Arts Sciences |
| CIAT | California Institute of Arts Technology |
| CIAT | California Institute of Automotive Technology |
| CIAT | Chartered Institute of Architectural Technologists |
| CIB | Capacity And Institution Building |
| CIB | Chengdu Institute of Biology |
| CIBC | Commonwealth Institute of Biological Control |
| CIBH | Cuba Institute Biotechnology and Heredity |
| CIBI | Carmelite Institute of Britain and Ireland |
| CIBL | Confucius Institute for Business London |
| CIBN | Chartered Institute of Bankers of Nigeria |
| CIBSE | Chartered Institute of Building Services Engineers |
| CIBT | Cornell Institute for Biology Teachers |
| CIBT | Crown Institute of Business and Technology |
| CIC | Correctional Institutions Chaplaincy |
| CICA | California Institute of Contemporary Arts |
| CICA | Canadian Institute of Chartered Accountants |
| CICAR | Cooperative Institute for Climate Applications and Research |