| Abbreviation | Definition |
|---|---|
| COI | Center Of Influence |
| COI | Class Of Interface |
| COI | Communications Operating Instructions |
| COI | Community Of Interest |
| COI | Contact Of Interest |
| COI | Critical Operational Issue |
| COIC | Combat Operations and Intelligence Center |
| COIC | Critical Operational Issues and Criteria |
| COIN | counterinsurgency |
| COINS | Community On-line Intelligence System |
| COIR | Command Operation and Information Request |
| COIST | Company Intelligence Support Team |
| COL | Colonel |
| COL | Combat Operations Loss |
| COLDS | Cargo Off-Load and Discharge System |
| COLISEUM | Community On-Line Intelligence System for End-Users and Managers |
| Coll | collecting |
| COLPRO | COLlective PROtection |
| COLPT | Collection Point |
| COLT | Combat Observation and Lasing Team |