| Acronym | Meaning |
| NEC | Navy Enlisted Classification |
| NEC | Nippon Electric Company |
| NECS | Navy Embedded Computer System |
| NEDALS | Navy Engineering Data Asset Locator System |
| NEMP | Nuclear Electromagnetic Pulse |
| NEOCS | Navy Enlisted Occupational Classification System |
| NETPDC | Naval Education And Training Program Development Center |
| NETSC | Naval Education And Training Support Center |
| NEWTS | Naval Electronic Warfare Training Sys (10h1) |
| NFC | Navy Finance Office |
| NFO | Naval Flight Officer |
| NFO | Navy Finance Office |
| NFOV | Narrow Field Of View |
| NFS | Network File System |
| NG | Gas Turbine Speed (rpm) |
| NGCR | Next Generation Computer Resources (navy Program) |
| NGL | Gas Generator Speed Left |
| NGOS | Gas Generator Overspeed |
| NGR | Gas Generator Speed Right |
| NIIN | National Item Identification Number |
| NIPA | Naval Intelligence Production System |
| NIPC | Nacelle Ice Protector Controller |
| NIPIMS | Navmat Instructional Procurement And Inventory Monitoring Sys |
| NIPS | Naval Intelligence Processing Center Upgrade Program |
| NIS | Naval Investigative Service |
| NIST | National Institute Of Standards & Technology |
| NITRAS | Navy Integrated Training Resources And Administration System |
| NIU | Nacelle Interface Unit |
| NLG | Nose Landing Gear |
| NMC | Naval Material Command |
| NMC | Not Mission Capable |
| NMCM | Not Mission Capable Maintenance |
| NMCMS | Not Mission Capable Maintenance Scheduled |
| NMCMU | Not Mission Capable Maintenance Uncheduled |
| NMCS | Not Mission Capable Supply |
| NMDAS | Navy Manpower Data Accounting System |
| NOBC | Navy Officer Billet Classification |
| NOE | Nape Of The Earth |
| NOR | Notice Of Revision |
| NORM | Normal |
| NORPAX | North Pacific Experiement |
| NOSC | Naval Ocean Systems Center |
| NOTAL | Not To All |
| NOTAP | Navy Occupational Task Analysis Program |
| NP | Power Turbine Speed |
| NPD | Navy Procurement Directive |
| NPL | Power Turbine Speed Left |
| NPM | Navy Programming Manual |
| NPOS | Power Turbine Overspeed |
| NPPS | Navy Publishing And Printing Service |