| Abbreviation | Definition |
|---|---|
| NCISRO | Naval Criminal Investigative Service Regional Office |
| NCISRU | Naval Criminal Investigative Service Resident Unit |
| NCIX | National Counterintelligence Executive |
| NCM | Non-Commissioned Member |
| NCMA | National Command and Military Authorities |
| NCMG | Nature Coast Marine Group |
| NCMP | NATO Command Military Police |
| NCMP | Navy Capabilities and Mobilization Plan |
| NCND | Neither Confirm Nor Deny |
| NCO | National Cadet Officer |
| NCO | Naval Command Office |
| NCO | Non-Combat Operations |
| NCO | Noncommissioned Officer |
| NCO | Non-Commissioned Officer |
| NCO(s) | non-commissioned officer(s) |
| NCOB | National Counterintelligence Operations Board |
| NCOES | Noncommissioned Officer Education System |
| NCOIC | Noncommissioned Officer In Charge |
| NCOK | Nederlandse Christenmilitairen Ontmoetingskring |
| NCOPD | Noncommissioned Officer Professional Development |