| Abbreviation | Definition |
|---|---|
| NRTL | Nationally Recognized Testing Laboratories |
| NSCL | National Superconducting Cyclotron Laboratory |
| NSDL | National Soil Dynamics Laboratory |
| NSE | Not substantially equivalent |
| NSEL | Nanoparticle Systems Engineering Laboratory |
| NSEL | Nanoscale Science and Engineering Laboratory |
| NSEL | Newmark Structural Engineering Laboratory |
| NSF | Non-Sorbitol Fermenter |
| NSG | Neuro-Sino Gram |
| NSIL | nano Structure Integration Laboratory |
| NSIL | National Seafood Inspection Laboratory |
| NSIL | Networking and System Integration Laboratory |
| NSIL | Nuclear Science and Instrumentation Laboratory |
| NSL | National Science Laboratories |
| NSL | National Sedimentation Laboratory |
| NSL | Network Security Laboratory |
| NSL | Networked Systems Laboratory |
| NSL | Neural Systems Laboratory |
| NSL | Nonlinear Sytems Laboratory |
| NSL | Nuclear Science Laboratory |