| 序号 | 英文 | 音标 | 词性 | 中文 |
| | NDIC | | | =Nuclear Data Information Center 核数据情报中心([美]ORNL) |
| | NDIR | | | =Non-Dispersive Infra-Red 无弥散红外线 |
| | NDIS | | abbr. | [计] Network Driver Interface Standard网络驱动器接口标准 |
| | NDL | | | =National Diet Library 国会图书馆[日] |
| | NDP | | | =nucleoside diphospate 三磷酸核苷 |
| | NDPS | | | =National Data Processing Service 全国数据处理服务所([英]邮政局) |
| | NDRE | | | =Notional Defence Research Establishment(挪威)国防研究中心 |
| | NDRO | | | =Non Destructive Read Out 非破坏读出 |
| | NDRW | | | =Non-Destructive Read Write 非破坏读写, 无损坏读写 |
| | NDS | | | =Nuclear Data Section 核数据处(IAEA) |
| | NDT | | | =Non Destructive Testing 非破坏性试验, 无损检验 |
| | NDX | | n. | DOS文件扩展名：索引文件 |
| | NDak. | | | North Dakota 美国北达科他州州名 |
| | NE | | abbr. | 1.东北 (North-East) 2.东北的 (North-Estern) |
| | NEA | | | =National Education Association 全国教育协会[美] |
| | NEAC | | | =Nippon Electric Automatic Computer 日本电气公司制电子计算机 |
| | NEB | | | =National Energy Board (加拿大)国家能源局 |
| | NEC | | | NEC公司，是世界五大电脑制造商之一 |
| | NECS | | | =National Electrical Code Standards 全国电气规程标准[美] |
| | NED | | | =New English Dictionary (=Oxford English Dictionary)《新英语词典 》(即《牛津英语词典 》) |
| | NEDA | | | =National Economics and Development Authority 国民经济与开发局[菲] |
| | NEDAR | | | =Nautical Exploration Device and Recoverer 海洋探测装置与回收装置 |
| | NEDC | | abbr. | （英国）全国经济发展委员会 |
| | NEDU | | | =Navy Experimental Diving Unit 海军实验潜水设备[美] |
| | NEF | | | =National Extra Fine (thread)(美)极细牙螺纹 |
| | NEFD | | | =Noise Equivalent Flux Density 噪声等效通量密度 |
| | NEFO | | | =National Electronics Facilities Organization 全国电子设备组织[美] |
| | NEI | | abbr. | not elsewhere included 别处不含 |
| | NEIC | | | =National Earthquake Information Center 全国地震情报中心[美] |
| | NEL | | | =Naval Electronics Laboratory 海军电子研究所[美] |
| | NEMA | | abbr. | 国际电气制造业协会 |
| | NEMIC | | | =New England Materials for Instruction Center 新英格兰教育资料中心[美] |
| | NEN | | | =Nederlands Norm 荷兰国家标准 |
| | NEP | nep | abbr. | New Economic Policy (罗斯福)新政 |
| | NEPA | | | =National Environmental Policy Act 国家环境政策法案[美] |
| | NERA | | | =National Emergency Relief Administration 国家紧急救济署[美] |
| | NERC | | abbr. | National Environment Research Council (英国)全国环境研究委员会 |
| | NERO | | | =Na Experimental Reactor of 0 零钠实验性反应堆 |
| | NES | | n. | e.s.abbr.not elsewhere specified 不另说明,别处不作说明 |
| | NESC | | | =National Electrical Safety Code 全国用电安全规程[美] |
| | NETFS | | abbr. | National Educational Television Film Service 全国教育电视片服务部 |
| | NETR | | | =Nuclear Engineering Test Reactor 核子工程试验反应堆 |
| | NEbE | | abbr. | northeast by east 东北偏东 |
| | NEbN | | abbr. | northeast by north 东北偏北 |
| | NF | | | =national fine (thread)美制细牙螺纹 |
| | NFA | | | =National Foundry Association 全国铸造协会[美] |
| | NFAIS | | | =National Federation of Abstracting and Indexing Services 全国文摘及索引机构联合会[美] |
| | NFC | | abbr. | National Football Conference, 国家足球联盟 |
| | NFFS | | | =Non-Ferrous Founders' Society 有色金属铸造工作者协会 |
| | NFL | | abbr. | National Football League, 美国国家足球联盟 |
| | NFM | | | =Narrow-band Frequency Modulation 窄频带调制 |
| | NFPA | | | =National Fire Protection Association 国家防火协会[美] |
| | NFS | | | [计] 网络文件系统 |
| | NFU | | abbr. | National Farmers'Union (英国)全国农场主联合会 |
| | NFWI | | abbr. | National Federation of Women's Institutes (英国)全国妇女协会联合会 |
| | NG | | | =Narrow Gauge 窄轨距 |
| | NGA | | abbr. | National Graphical Association (英国)全国印刷协会 |
| | NGAC | | | =National Guard Air Corps 国民警卫队空军部队[美] |
| | NGC | | abbr. | New General Catalogue (of Nebulae and Clusters of Stars )[天](星云星团)新总表 |
| | NGF | | | =Nerve Growth Factor 神经生长因子 |
| | NGL | | | =Natural Gas Liquid 液态天然气 |
| | NGP | | abbr. | [军] Nominal Ground Pressure, 名义地面压力 |
| | NGRI | | | =National Geophysical Research Institute 国立地球物理研究所[印] |
| | NGTE | | | =National Gas Turbine Establishment 国家燃气轮机研究中心[英] |
| | NGU | | abbr. | nongonococcal urethritis [医]非淋球菌性尿道炎 |
| | NH | | | =New Hampshire 新罕布什尔(美国州名) |
| | NHA | | | =National Health Association 全国卫生协会[美] |
| | NHB | | | =National Harbours Board 国家港务局(加拿大) |
| | NHE | | | =normal hydrogen electrode 标准氢电极 |
| | NHI | | abbr. | National Health Insurance (英国)国民健康保险 |
| | NHK | | abbr. | <日> Nippon Hoso Kyokai 日本广播协会( = Japan Broadcasting Corporation) |
| | NHL | | abbr. | National Hockey League (美国)全国曲棍球联合会 |
| | NHP | | n. | h.p.abbr.nominal horsepower 标称马力,额定功率 |
| | NHRA | | abbr. | National Hot Rod Association (美国)全国改装式高速汽车协会 |
| | NHS | | abbr. | National Health Service 英国国民健康保险制度 |
| | NHTSA | | abbr. | National Highway Traffic Safety Administration (美国)国家公路交通安全管理局 |
| | NHV | | | =net heating value净热值 |
| | NHed | | | =New Hebrides.新赫布里底群岛(南太平洋) |
| | NI | | abbr. | （英国的）国民保险制度 (National Insurance) |
| | NIAE | | | =National Institute of Adult Education 国家成人教育研究所[美] |
| | NIAG | | | =NATO Industrial Advisory Group 北约组织工业顾问团 |
| | NIAL | | | =National Institute of Arts and Letters 全国文学和艺术学会[美] |
| | NIC | nIk | abbr.；abbr. | abbr. [计] 网络接口卡；abbr. Network Information Center 网络信息中心 |
| | NIDA | | | =Numerically Integrated Differential Analyzer 数字集成微分分析器 |
| | NIE | | abbr. | 新工业化经济 (newly-industrializing economy) |
| | NIH | | abbr. | National Institutes of Health (美国)全国卫生研究所 |
| | NII | | abbr. | [计]<美> 国家信息架构(National Information Infrastructure) |
| | NILS | | | =Nuclear Instrument Landing System 核仪表着陆系统 |
| | NIM | | | 尼姆标准 |
| | NIMBUS | 5nimbEs | | 大型气象试验卫星 |
| | NIOSH | | | National Institute for Occupational Safety and Health 国立职业安全与健康研究所 |
| | NIPO | | | =Negative Input Positive Output 负输入, 正输出 |
| | NIR | | | =acrylonitrile-isoprene rubber 丙烯腈-异戊二烯橡胶 |
| | NIRA | | abbr. | National Industrial Recovery Act (美国)全国工业复兴法 |
| | NIRC | | abbr. | National Industrial Relations Court(英国)全国劳资关系法院 |
| | NIRNS | | | =National Institute for Research in Nuclear Science 全国核子科学研究所[英] |
| | NIRS | | | =National Institute of Radiological Sciences 国立放射学研究所[日] |
| | NIRTS | | | =new integrated rang timing system 新型集成测距定时系统 |
| | NIS | | abbr. | [计] Network Information Services,网络信息服务 |
| | NJ | | | =New Jersey 新泽西([美]州名) |
| | NJC | | | =National Joint Council 全国联合委员会[英] |