| Abbreviation | Definition |
|---|---|
| CORDIVEM | Corps/ Division Evaluation Model |
| CORDS | Coherent-On-Receive Doppler System |
| CORE | COmbat REadiness |
| CORE | COntingency REsponse |
| CORN | Change Order Request Notification |
| CORONA | City Of Repugnant Odorous Native Animals |
| CORPSSAM | Surface-to-Air Missile at the Corps level |
| CORR | Coherent-On-Receive Radar |
| CORR | oherent-On-Receive Radar |
| CORS | Continuously Operating Reference Station |
| COS | Champions Of The Sea |
| COS | Chief Of Staff |
| COS | Chief of Supply |
| COS | Civilian Occupational Specialty |
| COS | COmmunications Segment |
| COS | Company Orderly Sergeant |
| COS | contingency operating statIon |
| COS | Corporation for Open Systems |
| COS | Corps Support |
| COS | Covert Organization Search |