| Abbreviation | Definition |
|---|---|
| CH | Critical Hours |
| CHAMPS | Career Historical Archival Medical and Personnel System |
| CHAMPUS | Civilian Health And Medical Program of the Uniformed Services |
| CHAMPVA | Civilian Health and Medical Program of the Veterans Administration |
| CHI | Commission for Health Improvement |
| CHI | Consolidated Health Initiative |
| CHIP | Children’s Health Insurance Program |
| CHIP | Children’s Health Insurance Programme |
| CHIP | Childrens Health Insurance Program |
| CHIP | Childrens Health Insurance Programme |
| CHIP | CHildren's Internet Protection Act |
| CHIP | Collaborative HIPAA (Health Insurance Portability and Accountability Act) Implementation Project |
| CHPD | Centre for High Performance Development |
| CHPF | Congress High Priority Funds |
| CHPP | Congressional High Priority Project |
| CI | Classified Information |
| CI | Contact Information |
| CI | Critical Infrastructure |
| CIA | Custom Interface Agreement |
| CIAC | Computer Incident Advisory Capability (U.S. Department of Energy) |