| Abbreviation | Definition |
|---|---|
| CI | Coordinating Installation |
| CI&I | Compatibility, Interoperability, and Integration |
| CI/KR | Critical Infrastructure/key Resources |
| CIA | California International Airshow |
| CIA | Capitalisms International Army |
| CIA | Capitalisms Invisible Army |
| CIA | Commander's Initial Assessment |
| CIA | Comrades In Arms |
| CIAC | Cuerpo de Ingenieros de Armamento y Construcci??n |
| CIAC | Cuerpo de Ingenieros de Armamento y Construcción |
| CIAP | Central Intelligence Agency Program |
| CIAP | Civil Information Awareness Program |
| CIAP | Command, Control, Communications, Computers, Intelligence Surveillance, and Reconnaissance (C4ISR) Integrated Architecture Program |
| CIAP | Competition In Arms Program |
| CIAP | Critical Infrastructure Assurance Program |
| CIAS | Counter-Intelligence Analysis Section |
| CIASBAD | Coordinate, Issues, Assign, Supervise, Brief, Advise, Debrief |
| CIAT | Counter-Intelligence Analytic Team |
| CIB | Combined Information Bureau |
| CIB | Controlled Image Base |