| Abbreviation | Definition |
|---|---|
| NAU | Network Address Unit |
| NAV | Navigation |
| NAVSTAR | Navigation Signal Timing and Ranging |
| NB | Noise Blanker |
| NBC | Narrow Band Combiner |
| NBE | Near Band Edge |
| NBE | Nebraska Business Electronics |
| NB-FTMW | Narrow-Band Fourier Transform MicroWave |
| NBR | Nitrile Butadiene-Acrylonitrile Rubber |
| NBS | National Bureau of Standards (now National Institute of Standards and Technology) |
| NBS | Nothing But Signal |
| NBTI | Negative Bias Temperature Instability |
| NC | Neutral Current |
| NC | No Conductor |
| NC | Noise Cancelling |
| NC | Normally Closed |
| NC | Numerical Control |
| NCEE | National Coalition for Electronics Education |
| NCEL | North Central Electrical League |
| NCER | National Center for Electronics Recycling |