| Acronym | Meaning |
 | NAVCENT | Naval Forces U.S. Central Command |
| NAVEUR | Naval Forces U.S. European Command |
| NAVFE | U.S. Naval Forces |
| NAVFOR | Naval Force |
| NAVMACS | Naval Modular Automatic Communication Subsystem |
| NAVNET | Navy Network |
| NAVS | Non-Cooperative Airborne Vector Scoring |
| NAVSAT | Navigation Satellite |
| NAVSPACECOM | U.S. Navy Space Command |
| NAVSPASUR | U.S. Naval Space Surveillance System |
| NAVSTAR | Navigation Satellite Timing And Ranging |
| NAVTACNET | Navy Tactical Network |
| NAWC | U.S. Naval Air Warfare Center |
| NAWMP | North American Waterfowl Management Plan (gnaw-wump) |
| NB | New Brunswick (postal Symbol) -nota Bene (Latin |
| NB | Niobium |
| NB | Norwegian Bokm?l Language (ISO 639-1 Code) |
| NBA | National Basketball Association |
| NBACC | U.S. National Biodefense Analysis And Countermeasures Center (enn-back) |
| NBC | National Broadcasting Corporation - Nuclear |
| NBCRS | NBC (Nuclear |
| NBL | Southern Ndebele Language (ISO 639-2 Code) |
| NBT | Nitroblue Tetrazolium (assay) |
| NC | Network Computer -New Caledonia (ISO 3166 Digram) -Node Centre - Non-Consensual - Normally Closed -North Carolina (postal Symbol) |
| NC | Nanocoulomb |
| NC3A OR NC?A | NATO Consultation |
| NCA | National Command Authority |
| NCAA | National Collegiate Athletic Association (NC Double A) |
| NCAR | U.S. National Center For Atmospheric Research |
| NCB | National Codification Bureau |
| NCCAM | U.S. National Center For Complementary And Alternative Medicine |
| NCDDR | U.S. National Center For The Dissemination Of Disability Research |
| NCES | U.S. National Center For Education Statistics - Net-Centric Enterprise Services |
| NCI | U.S. National Cancer Institute |
| NCIS | National Criminal Intelligence Service (British) - Naval Criminal Investigative Service (U.S. Navy) |
| NCL | New Caledonia (ISO 3166 Trigram) |
| NCO | Non-Commissioned Officer |
| NCP | Net Contracted Purchases |
| NCR | National Cash Register Co. |
| NCTR | Non-Co-operative Target Recognition |
| NCW | Network Centric Warfare |
| ND | Non-Disclosure -North Dakota (postal Symbol) |
| ND | Neodymium |
| ND | Northern Ndebele Language (ISO 639-1 Code) |
| NDAA | U.S. National Defense Authorization Act |
| NDCC | New Directions Counseling Center (Concord |
| NDE | Northern Ndebele Language (ISO 639-2 Code) |
| NDO | Ndonga Language (ISO 639-2 Code) |
| NDP | New Democratic Party (Canada) |
| NDS | Nintendo DS |
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