| Abbreviation | Definition |
|---|---|
| CIVPOL | CIVilian POLice |
| CIVR | Configuration Item Verification Review |
| CIWG | Combat Identification Working Group |
| CIWG | Communications Interoperability Working Group |
| CIWS | Close In Weapon System |
| CIWS | Close In Weapon Systems |
| CIWS | Close In Weapons System |
| CIWS | Close-In Weapon System |
| CIWT | Cold Iron Watch Trainer |
| CJ | Continuous Jammer |
| CJ-4 | Combined-Joint Logistics Officer |
| CJATF | Commander, Joint Amphibious Task Force |
| CJB | Congressional Justification Book |
| CJCS | Chairman of the Joint Chiefs of Staff |
| CJCSAN | Chairman of the Joint Chiefs of Staff Alerting Network |
| CJCSI | Chairman of the Joint Chiefs of Staff Instruction |
| CJCSM | Chairman of the Joint Chiefs of Staff Manual |
| CJDA | Critical Joint Duty Assignment |
| CJMAB | Central Joint Mortuary Affairs Board |
| CJMAO | Central Joint Mortuary Affairs Office |