| Abbreviation | Definition |
|---|---|
| CIB | Certificate of Indian Blood |
| CIB | Combat Infantryman Badge |
| CIB | Compliance Information Branch |
| CIC | Committee for Institutional Cooperation |
| CIC | Consumer Information Center |
| CICA | Counterintelligence Coordinating Authorithy |
| CICOR | Cooperative Institute for Climate and Ocean Research |
| CIF | Creativity Index Factor |
| CIHS | Center for Integrated Health Solutions |
| CIIB | Corporate Information Infrastructure Board |
| CIIL | Clinical Investigator Inspection List |
| CIMS | Contract Information Management System |
| CIMS | Coordinated Incident Management System |
| CIOS | Combined Intelligence Objectives Subcommittee |
| CIP | Capital Improvement Project |
| CIP | Community Involvement Project |
| CIPRIS | Coordinated Interagency Partnership Regulating International Students |
| CIR | Commissioner Of Internal Revenue |
| CIR | Continuous Improvement Review |
| CIRB | Conflict of Interest Review Board |