| Abbreviation | Definition |
|---|---|
| CQO | Close Quarter Operations |
| CR | Carriage Return |
| CR | Close Range |
| CR | Communications Requirements |
| CR | Compact Rifle |
| CR | Continuing Resolution |
| CR | Continuous Recruitment |
| CR | Conventional Recoil |
| CR | Critical Requirement |
| CR | crossroad(s) |
| CRA | Command Relationships Agreement |
| CRA | Commander Royal Artillery |
| CRA | Continuing Resolution Authority |
| CRA | Cooperative Research Agreement |
| CRA | Coordinating Review Authority |
| CRADA | Cooperative Research And Development Agreement |
| CRAF | Civil Reserve Air Fleet (civilian planes used in time of conflict) |
| CRAFT | Collaborative Radar Acquisition Field Test |
| CRAG | Compass, Radar, And GPS |
| CRAM | Control Random Access Memory |