| Abbreviation | Definition |
|---|---|
| NAL | NASA Alumni League |
| NAM | National Association Of Manufacturers |
| NAMMA | NASA African Monsoon Multidisciplinary Analyses |
| NAOO | National Oceanic and Atmospheric Administration |
| NAP | Navigation Analysis Program |
| NAP | Non-Astronomical Program |
| NAPA | National Aviation Parts Assistance |
| NAPA | No Appropriate Parts Available |
| NAR | Numerical Analysis Research |
| NARC | North American Rockwell Corporation |
| NARS | National Archives and Record Services |
| NAS | National Aerospace Standard |
| NAS | National Aerospace Standards |
| NAS | National Aircraft Standard |
| NAS | Numerical Aerospace Simulation |
| NASA | National Aeronautics and Space Administration (of U.S.A) |
| NASA | National Air and Space Administration |
| NASCAD | NASA Computer Aided Design |
| NASCOM | NASA Communications |
| NASCOM | NASA COMmunications Network |