| Abbreviation | Definition |
|---|---|
| CNN | Commercial News Network |
| CNO | Chief of Naval Operations |
| CNO | Computer Network Operations |
| CNOG | Chairman, Nuclear Operations Group |
| CNR | Combat Net Radio (SINCGARS) & Improved High Frequency Radio (IHFR) |
| CNRF | Commander, Naval Reserve Forces |
| CNRSW | Commander, Navy Region Southwest |
| CNSG | Commander, Naval Security Group |
| CNT | Coordinated Network Testing |
| CNTG | Canadian Naval Task Group |
| CNTG | Computer Network Transaction Groups |
| CNTY | CouNTrY |
| CNV | Commonwealth Naval Vessel |
| CNV | Conversion |
| CNWDI | Critical Nuclear Weapon Design Information |
| CO | Commanding Officer |
| CO | Company |
| CO | Contracting Officer |
| CO2 | Consideration Of Others training |
| COA | Comptroller Of the Army |