| Abbreviation | Definition |
|---|---|
| NSDS-E | Navy Satellite Display System-Enhanced |
| NSE | National Support Element |
| NSE | Navy Support Element |
| NSEP | National Security Emergency Preparedness |
| NSF | Net Square Feet |
| NSF | Northern Special Forces |
| NSF | Not So Fast |
| NSFS | Naval Surface Fire Support |
| NSG | National Security Guard |
| NSG | National System For Geospatial Intelligence |
| NSG | Naval Support Group |
| NSG | North-Seeking Gyro |
| NSGA | Naval Security Group Activity |
| NSGI | National System for Geospatial Intelligence |
| NSH | Nova Scotia Highlanders |
| NSHQ | Naval Service Headquarters (Canada) |
| NSHS | National Strategy for Homeland Security |
| NSI | Not Seriously Injured |
| NSI | Numeric System Identifier |
| NSIP | NATO Security and Investment Program |