| Abbreviation | Definition |
|---|---|
| NOPE | Number Of Processing Elements |
| NOT | Negation (logical NOT) |
| NOVRAM | NOn-Volatile Random Access Memory |
| NPI | Not Plugged In |
| NPN | Negative-Positive-Negative transistor |
| NPR | Noiseless Portable Reflector |
| NPTH | Non-Plated Through Hole |
| NPUR | No Parts Used for Repair |
| NQSL | Nelco Quad Serial Loop |
| NR | No Rewind |
| NRRR | Non-Return-to-Reference Recording |
| NRTS | Near Real-Time System |
| NS | Network Simulator |
| NS | Not Supported |
| NSA | Network Security Appliance |
| NSF | Non-Standard Facilities |
| NSSO | Networked Storage Solution Organization |
| NT | Network Terminal |
| NT | Non-Terminal |
| NTARS | Never Touch A Running System |