| Abbreviation | Definition |
|---|---|
| NDTL | Nondestructive Test Laboratory |
| NDTL | Non-Destructive Test Laboratory |
| NE | Near Earth |
| NEA | Near Earth Asteroid |
| NEA | Noise Equivalent Angle |
| NEAP | Near Earth Asteroid Prospector |
| NEAR | Near Earth Asteroid Rendezvous |
| NEAT | Near Earth Asteroid Tracker |
| NEAT | Network of Educator Astronaut Teachers |
| NEB | Network Engineering Branch |
| NEBA | NASA Employee Benefit Association |
| NEC | National Electrical Code |
| NED | NASA Extra-galactic Database |
| NEEDS | NASA End-To-End Data System |
| NEG | Negative |
| NEMS | NASA Equipment Management System |
| NEO | Near-Earth Object |
| NEP | Normal Entry Point |
| NEPA | National Environmental Protection Act |
| NERO | National Experimental Rocket Organization |