英文缩写分类（N 开头）

N N64 NA NAA NAAA NAAB NAABSA NAAC NAACP NAADC NAAS NAASO NAATI NAB NABBE NABS NABT NACB NACC NACCD NACE NACEEO NACH NACO3 NACOA NACOTA NACU NACW NAD NADF NADP NAETI NAEYC NAFED NAFEM NAFSS NAFTA NAGC NAHC NAI NAIA NAICU NAJ NAK NAL NALC NALS NAM NAME NAMH NANA NAOC NAOH NAP NAPA NAPHTH NARAL NARAS NARC NARIC NARMA NARMS NARS NAS NASA NASBA NASC NASCAR NASD NASDAQ NASF NASFM NASP NASR NASULGC NAT NATA NATE NATIONWIDE NATL NATM NATO NATP NATS NAUT NAV NAVH NAVI NAVSTAR NAVTEX NAWA NAWPA NB NBA NBAA NBBB NBBPVI NBBS NBC NBCC NBD NBDL NBDP NBE NBFM NBFSPQ NBI NBIF NBL NBMA NBME NBO NBPC NBR NBRI NBS NBST NBTC NBU NC NCA NCAA NCAC NCAHF NCAL NCAP NCAPC NCB NCBA NCBDE NCBE NCBI NCC NCCD NCCLS NCCTA NCDA NCDC NCEE NCEP NCEPC NCEPU NCFAP NCFDA NCFOT NCGRP NCI NCIC NCMDA NCNA NCNR NCNST NCO NCOC NCP NCQ NCQSTAP NCR NCRE NCRNAS NCRP NCS NCSA NCSBCS NCSC NCTA NCTC NCTE NCTM NCTO NCTR NCU NCUA NCUC NCUT NCV NCW NCWS ND NDA NDAC NDB NDC NDD NDE NDEA NDF NDFA NDI NDIS NDL NDPB NDPE NDR NDRC NDS NDSL NDT NE NEA NEB NEBR NEBS NEC NED NEDM NEE NEF NEFU NEG NEGB NEGO NEH NEIC NEM NEMA NEMI NEO NEP NER NERA NERC NERL NES NESAT NESPC NESRI NESSWG NEST NET NETBEUI NETBIOS NETC NETD NETL NETP NETPC NETRC NETS NEV NEWS NEX NEXRAD NEXT NF NFAF NFAH NFAL NFAP NFBPWC NFC NFCCFS NFCF NFD NFDS NFE NFEA NFFN NFI NFIDCS NFIE NFIRS NFIS NFKB NFL NFLDS NFMD NFPA NFPABS NFPAFIDOS NFPAMS NFPARR NFPC NFPCA NFR NFRA NFRC NFRS NFS NFSA NFTC NG NGA NGAUS NGBT NGF NGFA NGI NGIO NGL NGMTS NGN NGO NGP NGR NGRE NGRI NGS NGSP NGTE NGWA NH NH3 NH4 NHA NHC NHDC NHE NHEB NHF NHI NHIC NHK NHL NHLBI NHO NHP NHRA NHS NHSB NHSC NHTSA NI NI(R) NIA NIAAA NIAE NIAID NIAT NIB NIBP NIBS NIC NICB NICE NICPBP NICU NID NIDA NIDDK NIDDM NIDS NIE NIEHS NIEP NIFO NIH NIHN NII NIIMS NIIR NIJ NIL NIM NIMH NIO NIOSH NIP NIPH NIR NIRE NIS NISC NISDN NISM NISS NISSTR NIST NISTDS NISTPJ NIT NJ NJAC NJMFPA NJSFMBA NJTV NJU NK NKDA NKF NKFA NKOREA NKU NKVD NL NLAA NLB NLC NLEA NLFR NLG NLGI NLM NLP NLPGA NLRB NLS NLX NM NMA NMAB NMB NMC NMCB NMCS NMD NMDC NME NMEA NMEC NMET NMF NMHA NMHCSSA NMI NML NMMA NMO NMOS NMP NMR NMS NMSI NMT NMTHC NN NNB NNC NND NNDRC NNE NNF NNFA NNI NNMC NNN NNP NNR NNS NNSA NNSS NNT NNTP NNTS NO NO2 NO3 NOAA NOAO NOC NOCIL NOE NOED NOFAVT NOHL NOI NOK NOMCOM NOMSS NONMC NOP NOPWC NOR NORAMET NORINCO NORM NOS NOSA NOSB NOSC NOSS NOSTA NOTAM NOTP NOTREDAME NOV NOW NOWAC NOWAPA NOX NOYB NP NPA NPACT NPB NPBL NPC NPD NPDU NPE NPEO NPF NPFPC NPGDA NPH NPI NPIC NPL NPN NPO NPP NPPA NPPC NPPL NPQB NPR NPRA NPS NPSH NPT NPTC NPU NPV NQA NQAA NQB NQC NQM NQR NR NRA NRAEF NRB NRC NRCC NRCCT NRE NRECA NREL NREN NRG NRI NRL NRLC NRN NROSS NRP NRPB NRS NRSC NRSRO NRT NRTA NRTC NRTVBR NRWC NS NSA NSAI NSAID NSAP NSB NSC NSCAT NSCDRF NSD NSE NSF NSFC NSFNET NSG NSI NSIP NSM NSMC NSMR NSMS NSNZ NSP NSPCA NSPCC NSPE NSR NSRT NSSN NST NSTA NSTI NSU NSW NSWC NT NTA NTB NTBS NTC NTCC NTD NTDS NTEA NTEP NTEPQ NTF NTFP NTFS NTG NTHU NTL NTLDR NTLM NTM NTMS NTMVA NTNU NTO NTP NTPM NTS NTSC NTT NTTAT NTU NTWT NU NUDP NUFP NUI NUL NUM NUP NURBS NUS NUSAT NUTS NV NVA NVB NVD NVE NVFC NVH NVM NVO NVOCC NVOD NVQ NVRAM NVT NW NWAA NWAC NWC NWCWB NWF NWG NWK NWL NWPU NWRED NWS NWSC NWSTP NWU NWX NX NXWK NY NYC NYCBCC NYCFC NYP NYPD NYSE NYSJM NYT NZ NZ$ NZD NZDA NZDSF NZFS NZFSA NZG NZL