| Abbreviation | Definition |
|---|---|
| NSL | Nuclear Structure Laboratory |
| NSOL | Networks and Systems Optimization Laboratory |
| NSQ | not sufficient quantity |
| NSRL | National Soybean Research Laboratory |
| NSRL | National Synchrotron Radiation Laboratory |
| NSRL | Natural Science Research Laboratory |
| NSRL | Network Science Research Laboratory |
| NSSL | National Seed Storage Laboratory |
| NSSL | National Severe Storm Laboratory |
| NSSL | National Severe Storms Laboratory |
| NSSL | National Sport Security Laboratory |
| NST | Non-Stress Test |
| NSTL | National Software Testing Laboratories |
| NSTL | National Soil Tilth Laboratory |
| NSTL | National Standards Testing Laboratory |
| NSTL | Naval Science and Technological Laboratory |
| NSTL | Navigation Systems & Technology Laboratory |
| NTDP | Neglected Tropical Disease Program |
| NTEL | Northern Territory Environmental Laboratories |
| NTEL | Northern Territory Environmental Laboratory |