Nonprotein Nitrogen非蛋白氮 National Prevention Network国家预防网络 Negative-Positive-Negative负极-正极-负极(晶体管) National Phenology Network (University of Wisconsin-Milwaukee)全国物候网络Wisconsin-Milwaukee大学 Natural Product Number天然产品的数量 NOAA Profiler Network (National Oceanic & Atmospheric Administration)网络(NOAA)进行的一项全国海洋与大气管理局) National Provider Network国家供应商网络 No Purchase Necessary没有购买 National Physician Network国内医师的网络 Neuropathic Pain Network神经痛的网络 National Particulate Network国家微粒的网络 National Poultry News国家家禽的消息 National Peer Network全国同行的网络 National Party of Nigeria尼日利亚国家党 Nashville Publishers Network (Nashville, TN)纳什维尔出版商网络(纳什维尔、TN)