| Abbreviation | Definition |
|---|---|
| COC | Captain Of Communications |
| COC | Chain Of Command |
| COC | Chart Overlay Copier |
| COC | Circle Of Confusion |
| COC | Combat Operations Center |
| COC | Corps Operations Center |
| COC | Council Of Colonels |
| COCC | Cadet Officer Candidate Course |
| COCFC | Central Ohio Combined Federal Campaign (now Heart of Ohio CFC) |
| COC-GE | Combat Operations Center-Ground Element |
| COCO | Comrades Of Children Overseas |
| COCO | Contractor-Owned, Contractor-Operated |
| COCOM | COmbatant COMmand |
| COCOM | COmbatant COMmander |
| COCOM | COntrolling COMmand |
| COCOM | COordinating COMmittee |
| COCS | Current Optical Contrast Seeker S |
| COD | Call Of Duty |
| COD | Central Ordinance Depot |
| COD | Combat Operations Division |