| Abbreviation | Definition |
|---|---|
| NM | Not Marked |
| NM | Not Misclassified |
| NMAWC | Naval Mine and Anti-Submarine Warfare Command |
| NMB | North Atlantic Treaty Organization (NATO) Military Body |
| NMC | Network Monitoring and Control |
| NMC | Non-Mission Capable |
| NMC | Not Mission Capable |
| NMCB | Naval Mobile Construction Battalion |
| NMCC | National Military Command Center |
| NMCCS | National Military Command and Control System |
| NMCI | Navy Marine Corps Internet |
| NMCM | Not Mission Capable, Maintenance |
| NMCS | National Military Command System |
| NMCS | Not Mission Capable, Supply |
| NMCSD | Naval Medical Center San Diego |
| NMD | National Missile Defense |
| NMD | No More Disarmament |
| NMD | Not My Department |
| NMEC | National Media Exploitation Center |
| NMET | Naval Mobile Environmental Team |