| Abbreviation | Definition |
|---|---|
| NOT | Negation (logical NOT) |
| NOVELny | New York Online Virtual Electronic Library |
| NP | No Picture |
| NP | Node Processor |
| NPEC | National Power Electronics Conference |
| NPEC | North Plains Electric Cooperative |
| NPF | Normal Power Factor |
| NPL | No (zero) Phonon Line |
| NPN | Negative-Positive-Negative transistor |
| NPR | Noise Power Ratio |
| NPT | Non Punch Through |
| NPT | Non-Punch Through |
| NPTH | Non-Plated Through Hole |
| NR | Noise Reduction |
| NR | Noise Removal |
| NR | Non-Redundant |
| NRA | Nuclear Reaction Analysis |
| NRD | Non-Radiative Dielectric |
| NRECA | National Rural Electric Cooperative Assn |
| NRECA | National Rural Electrical Cooperative Association |