| Abbreviation | Definition |
|---|---|
| NSP | National Search and Rescue Plan |
| NSP | Navy Support Plan |
| NSP | Nitro Spring Pack |
| NSP | Not Separately Priced |
| N-Sp/CC | North American Aerospace Defense Command (NORAD)-US Space Command/Command Center |
| NSPD | National Security Presidential Directive |
| NSPS | National Security Personnel System |
| NSPS | Not Something that Personnel Should-have-to-put-up-with |
| NSPS-AF | U.S. Air Force National Security Personnel System |
| NSR | National Security Review |
| NSR | National Strategy Review |
| NSRDC | David W. Taylor Naval Ship Research and Development Center, Bethesda, MD |
| NSRL | National Signals Intelligence (SIGINT) Requirements List |
| NSRL | National Signals Intelligence Requirements List |
| NSRP | National Shipbuilding Research Program |
| NSRS | NATO Submarine Rescue System |
| NSS | National Search and Rescue Supplement |
| NSS | National Security Strategy |
| NSS | National Security System |
| NSS | Navy Standardized Score |