| Abbreviation | Definition |
|---|---|
| NSR | Normal Slow Rate maneuver |
| NSR1 | First Coelliptic Maneuver |
| NSR2 | Second Coelliptic Maneuver |
| NSRL | NASA Space Radiation Laboratory |
| NSS | Nitrogen Supply Subsystem |
| NSSC | NASA Shared Services Center |
| NSSC | NASA Standard Spacecraft Computer |
| NSSDC | National Space Science Data Center |
| NSSDCA | NASA Space Science Data Coordinated Archive |
| NST | Non-Stress Test |
| NSTL | National Space Technology Laboratories |
| NSU | Non Shared Update |
| NSW | NSP (Network Signal Processor) Status Word |
| NT | Newton |
| NTB | Nasa Tech Briefs |
| NTC | NASA Teleconferencing Center |
| NTD | NASA Test Director |
| NTM | Network Test Manager |
| NTO | Nitrogen Tetroxide |
| NTOM | Network Technical and Operations Manager |