| Acronym | Meaning |
 | NDU | National Defense University (Washington |
| NE | Nebraska (postal Symbol) - Niger (ISO 3166 Digram) - North-East |
| NE | Neon |
| NE | Nepali Language (ISO 639-1 Code) |
| NEA | Near-Earth Asteroid - Nuclear Energy Agency (OECD) |
| NEAT | Near-Earth Asteroid Tracking |
| NEC | Network-Enabled Capability |
| NECTEC | National Electronics And Computer Technology Center (Thailand) |
| NEI | National Eye Institute - Not Enough Information - Nuclear Energy Institute |
| NEIC | U.S. National Earthquake Information Center - National Economic Intelligence Committee (Nigeria) - National Energy Information Center (U.S. DOE) - National Enforcement Investigations Center (U.S. EPA) |
| NEM CON | Nemine Contradicente (Latin |
| NEM DISS | Nemine Dissentiente (Latin |
| NEO | Near-Earth Object - Non-combatant Evacuation Operations |
| NEP | Nepali Language (ISO 639-2 Code) |
| NEPA | National Environmental Policy Act |
| NER | Niger (ISO 3166 Trigram) |
| NESDIS | National Environmental Satellite |
| NESP | NSA/CSS Enterprise Standards Program |
| NESS | T -Near-Earth Space Surveillance - Terrestrial Project |
| NET | National Educational Television |
| NETCU | (UK) National Extremism Tactical Co-ordination Unit |
| NETL | (US) National Energy Technology Laboratory |
| NETWARS | Network Warfare Simulation |
| NEWS | Navy Electronic Warfare Simulator - North |
| NEX | Navy EXchange |
| NF | Nanofarad |
| NF | Norfolk Island (ISO 3166 Digram) |
| NFA | No-Fire Area |
| NFC | National Football Conference |
| NFER | National Foundation For Educational Research |
| NFI | Not F****** Interested |
| NFK | Norfolk Island (ISO 3166 Trigram) |
| NFL | National Football League - No-Fire Line |
| NFLD | Newfoundland |
| NFPA | National Fluid Power Association (USA) |
| NG | Natural Gas - Next Generation -Niger (FIPS 10-4 Country Code) - Nigeria (ISO 3166 Digram) |
| NG | Nanogram - Ndonga Language (ISO 639-1 Code) |
| NGA | National Geospatial-Intelligence Agency -Nigeria (ISO 3166 Trigram) |
| NGATS | New Generation Army Targetry System |
| NGH | Northern General Hospital |
| NGIC | National Ground Intelligence Center (Injick) |
| NGN | Nigerian Naira (ISO 4217 Currency Code) |
| NGO | Non-Governmental Organization |
| NGS | Naval Gunfire Support |
| NH | Nanohenry |
| NH | New Hampshire (postal Symbol) - New Hebrides (ISO 3166 Digram; Obsolete 1980) - Vanuatu (FIPS 10-4 Country Code; From New Hebrides) |
| NHANES | National Health And Nutrition Examination Survey |
| NHB | No Holds Barred Radio (Link) |
| NHB | New Hebrides (ISO 3166 Trigram; Obsolete 1980) |
| NHL | National Hockey League |
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