| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| MVAS | Multipurpose Ventricular Actuating System | In English | |
| MVC | Manual Volume Control | In English | |
| MVC | Master Volume Control | In English | |
| MVD | Map and Visual Display | In English | → Human-computer interaction | 
| MVF | Manned Vertical Flight | In English | → Aeronautics, aircraft → Astronautics  | 
| MVGVT | Mated Vertical Ground Vibration Test | In English | |
| MVI | Microgravity Vestibular Investigation | In English | → Astronomy → Astronautics  | 
| MVL | Multilamellar Vesicle | In English | → Biotechnology → Pharmacology, toxicology  | 
| MVM | Mariner Venus/Mercury | In English | → Astronomy → Astronautics  | 
| MVMA | Maryland Veterinary Medical Association (www.mdvma.org) | In English | → Associations → Veterinary medicine  | 
| MVNO | Mobile Virtual Network Operator | In English | → Telecommunications | 
| MVO | Montserrat Volcano Observatory (www.mvo.ms) | In English | → Research institutes → 55121  | 
| MVP | Master Verification Plan | In English | |
| MVR | Measurement Velocity Radial | In English | |
| MVR | Multilingual Vocabulary Repository | In English | → Knowledge management → Linguistics  | 
| MVS | Middle-Value Select | In English | |
| MVS | Multiple Virtual Storage | In English | → Operating systems | 
| MVS/ESA | Multiple Virtual Storage/Enterprise System Architecture | In English | → Operating systems | 
| MVS/XA | Multiple Virtual Storage/Extended Architecture | In English | → Operating systems | 
| MVT | Multiprogramming with a Variable number of Tasks | In English | → Operating systems | 
| MVWT | Mated Vehicle Wind Tunnel | In English | → Vehicle engineering | 
| MW | (The) Muslim World | In English | → Islam → Area studies  | 
| MW | Microwave | In English | |
| MWA | Mental Workload Analyzer | In English | → Software | 
| MWB | Master Workbook | In English | |
| MWC | Mobile World Congress | In English | → Congresses → Telecommunications  | 
| MWD | Material Withdrawal Document | In English | → Maintenance and logistics | 
| MWF | Morale, Welfare, and Recreation | In English | → Entertainment | 
| MWG | Maintainability Working Group | In English | → Maintenance and logistics | 
| MWI | Mobile Web Initiative (www.w3.org/Mobile/) | In English | → Internet → Telecommunications  | 
| MWIR | Medium-Wavelength Infrared | In English | |
| MWN | Materials World Network | In English | → Organizations and associations → Materials science  | 
| MWOAR | Mount Wilson Observatory Annual Report | In English | → Serial publications, periodicals → Astronomy  | 
| MWOR | Maintenance Work Order Request | In English | → Maintenance and logistics | 
| MWP | Maximum Working Pressure | In English | |
| MWPR | Monthly Work Package Report | In English | → Management | 
| MWR | Mean Width Ratio | In English | |
| MWRv | Monthly Weather Review | In English | → Serial publications, periodicals → Meteorology, climatology  | 
| MWS | Missile Weapon System | In English | → Military engineering | 
| MWS | Missile Warning Set | In English | → Military engineering | 
| MWV | Maximum Working Voltage | In English | → Electrical engineering | 
| MXML | Macromedia Flex Markup Language | In English | → Programming languages | 
| MYTA | Maintainability Task Analysis | In English | → Maintenance and logistics | 
| MYVAL | Maintainability Evaluation | In English | → Maintenance and logistics | 
| MZFW | Maximum Zero Fuel Weight | In English | |
| N | Asparagine = N | Asparagina | In Catalan = N | Asparagin | In German = N | Asparagina | In Spanish = N | Asparagino | In Esperanto = N | Asparagine | In French = N | 아스파라긴 | In Japanese = N | Asparagin | In Indonesian = N | Asparagina | In Italian = N | אספרגין | In Hebrew = N | Asparagīns | In Latvian = N | Asparagin | In Letzeburgesh = N | Asparaginas | In Lithuanian = N | Asparagine | In Dutch = N | アスパラギン | In Japanese = N | Asparagina | In Polish = N | Asparagina | In Portuguese = N | Аспарагин | In Russian = N | Asparagín | In Slovak = N | Аспарагин | In Serbian = N | Asparagiini | In Finnish = N | Asparagin | In Swedish = N | Asparagin | In Turkish = N | Аспарагін | In Ukrainian = N | 天冬酰胺 | In Chinese  | 
In English | → Biochemistry, biophysics | 
| N | Nitrogen = N | Azote | In French = N | Stikstof | In Afrikaans = N | نيتروجين | In Arabic = N | Nitróxenu | In Asturian = N | Azot | In Azerbaijani = N | Азот | In Belarusian = N | Азот | In Bulgarian = N | নাইট্রোজেন | In Bengali = N | Dušik | In Bosnian = N | Nitrogen | In Catalan = N | Azotu | In Corsican = N | Dusík | In Czech = N | Азот | In Chuvash = N | Nitrogen | In Welsh = N | Kvælstof | In Danish = N | Stickstoff | In German = N | Άζωτο | In Greek = N | Azoto | In Esperanto = N | Nitrógeno | In Spanish = N | Lämmastik | In Estonian = N | Nitrogeno | In Basque = N | نیتروژن | In Persian = N | Typpi | In Finnish = N | Azôt | In Friulian = N | Nítrigin | In Irish = N | Nitróxeno | In Galician = N | નાઇટ્રોજન | In Gujarati = N | Neetragien | In Manx = N | חנקן | In Hebrew = N | नाइट्रोजन | In Hindi = N | Dušik | In Croatian = N | Azòt | In Haitian Creole = N | Nitrogén | In Hungarian = N | Ազոտ | In Armenian = N | Nitrogeno | In Interlingua = N | Nitrogen | In Indonesian = N | Nitro | In Ido = N | Nitur | In Icelandic = N | Azoto | In Italian = N | 窒素 | In Japanese = N | trano | In Lojban = N | აზოტი | In Georgian = N | 질소 | In Korean = N | Stickstoff | In Kölsch = N | Nîtrojen | In Kurdish = N | Nitrogenium | In Latin = N | Stéckstoff | In Letzeburgesh = N | Stikstof | In Limburgish = N | Azoti | In Lingala = N | Azotas | In Lithuanian = N | Slāpeklis | In Latvian = N | Hauota | In Māori = N | Азот | In Macedonian = N | നൈട്രജന് | In Malayalam = N | Азот | In Mongolian = N | नायट्रोजन | In Marathi = N | Ehēcatehuiltic | En Nahuatl = N | Stickstoff | In Low German = N | Stikstof | In Dutch = N | Nitrogen | In Nynorsk = N | Nitrogen | In Norwegian = N | Nitrogene | NOV = N | Azòt | In Occitan = N | Nitrogen | In Kapampangan = N | Azot | In Polish = N | Nitrogénio | In Portuguese = N | Qullpachaq | In Quechua = N | Azot | In Romanian = N | Азот | In Russian = N | Azzotu | In Sicilian = N | Dušik | In Serbo-Croatian = N | Dusík | In Slovak = N | Dušik | In Slovenian = N | Azoti | In Albanian = N | Азот | In Serbian = N | Kväve | In Swedish = N | Nitrojeni | In Swahili = N | நைட்ரஜன் | In Tamil = N | నత్రజని | In Telugu = N | Азот | In Tajik = N | ไนโตรเจน | In Thai = N | Azot | In Turkish = N | Азот | In Ukrainian = N | Azot | In Uzbek = N | Nitơ | In Vietnamese = N | 氮 | In Chinese  | 
In English | → Chemistry | 
| N2H2 | Hydrazine | In English | → Chemistry | 
| NA | Network Aspects | In English | → Networks, communication | 
| NA | Numerical Aperture | In English | |
| Na | Sodium = Na | Sodium | In French = Na | Natrium | In Afrikaans = Na | صوديوم | In Arabic = Na | Sodiu | In Asturian = Na | Натрый | In Belarusian = Na | Натрий | In Bulgarian = Na | সোডিয়াম | In Bengali = Na | Natrijum | In Bosnian = Na | Sodi | In Catalan = Na | Sodiu | In Corsican = Na | Sodík | In Czech = Na | Sodiwm | In Welsh = Na | Natrium | In Danish = Na | Natrium | In German = Na | ސޯޑިއަމް | In Dhivehi = Na | Νάτριο | In Greek = Na | Natrio | In Esperanto = Na | Sodio | In Spanish = Na | Naatrium | In Estonian = Na | Sodio | In Basque = Na | سدیم | In Persian = Na | Natrium | In Finnish = Na | Sodi | In Friulian = Na | Sóidiam | In Irish = Na | Sodio | In Galician = Na | Sodjum | In Manx = Na | נתרן | In Hebrew = Na | सोडियम | In Hindi = Na | Natrij | In Croatian = Na | Sodyòm | In Haitian Creole = Na | Nátrium | In Hungarian = Na | Նատրիում | In Armenian = Na | Natrium | In Indonesian = Na | Natro | In Ido = Na | Natrín | In Icelandic = Na | Sodio | In Italian = Na | ナトリウム | In Japanese = Na | sodna | In Lojban = Na | Natrium | JV = Na | ნატრიუმი | In Georgian = Na | ಸೋಡಿಯಮ್ | In Kannada = Na | 나트륨 | In Korean = Na | Natrîyûm | In Kurdish = Na | Natrium | In Latin = Na | Natrium | In Letzeburgesh = Na | Sodu | In Lingala = Na | Natris | In Lithuanian = Na | Nātrijs | In Latvian = Na | Konutai | In Māori = Na | Натриум | In Macedonian = Na | സോഡിയം | In Malayalam = Na | सोडियम | In Marathi = Na | Natrium | In Low German = Na | Natrium | In Dutch = Na | Natrium | In Nynorsk = Na | Natrium | In Norwegian = Na | Natrium | NOV = Na | Sôdgium | In Norman = Na | Sòdi | In Occitan = Na | Sód | In Polish = Na | Sódio | In Portuguese = Na | Natriyu | In Quechua = Na | Sodiu | In Romanian = Na | Натрий | In Russian = Na | Sodiu | In Sicilian = Na | Natrij | In Serbo-Croatian = Na | Sodík | In Slovak = Na | Natrij | In Slovenian = Na | Natriumi | In Albanian = Na | Натријум | In Serbian = Na | Natrium | In Swedish = Na | Natiri | In Swahili = Na | சோடியம் | In Tamil = Na | సోడియమ్ | In Telugu = Na | Натрий | In Tajik = Na | โซเดียม | In Thai = Na | Sodyum | In Turkish = Na | Натрій | In Ukrainian = Na | Natriy | In Uzbek = Na | Natri | In Vietnamese = Na | Sodiom | In Walloon = Na | 钠 | In Chinese  | 
In English | → Chemistry | 
| NAA | North American Aircraft | In English | → Aeronautics, aircraft → United States  | 
| NAA | 1-Naphthylacetic Acid | In English | → Biochemistry, biophysics | 
| NAAAID | National Association of Americans of Asian Indian Descent | In English | → Associations → Genealogy  | 
| NAAAP | National Association of Asian American Professionals | In English | → Associations → Labour, labour economics → United States  | 
| NAAB | National Association of Animal Breeders (www.naab-css.org) | In English | → Associations → Agricultural sciences  | 
| NAACLT | North American Association for Celtic Language Teachers (www.naaclt.org) | In English | → Associations → Education → Language, linguistics, literature  | 
| NAACP | National Association for the Advancement of Colored People | In English | → Associations → Labour, labour economics  | 
| NAAEE | National American Association of Environmental Education (www.naaee.org) | In English | → Associations → Education → Threats to the environment → United States  | 
| NaAIJ | Nanjing Aeronautical Institute Journal | In English | → Serial publications, periodicals → Aeronautics, aircraft → China  | 
| NAAL | North American Aerodynamic Laboratory | In English | → Research institutes → Aerodynamics  | 
| NAATA | National Asian American Telecommunications Association | In English | → Associations → Telecommunications  | 
| NABA | North American Broadcasters Association (www.nabanet.com) | In English | → Associations → Telecommunications  | 
| NABR | National Association for Biomedical Research (www.nabr.org) | In English | → Associations → Biological sciences → Medicine  | 
| NABT | National Association of Biology Teachers (www.nabt.org) | In English | → Associations → Education → Biological sciences  | 
| NAC | Naval Avionics Center | In English | → Aeronautics, aircraft | 
| NACA | National Advisory Committee for Aeronautics | In English | → Aeronautics, aircraft | 
| NACBS | North American Conference on British Studies | In English | → Organizations and associations → Area studies → United States  | 
| NACCP | National Association of Child Care Professionals | In English | → Associations → Pediatry  | 
| NACEC | North American Commission for Environmental Cooperation (www.cec.org) = CCAAN | Comisión para la Cooperación Ambiental de América del Norte | In Spanish = CNACE | Commission Nord-Américaine de Coopération Environnementale | In French = CNACA | Comissão Norte-americana de Cooperação Ambiental | In Portuguese  | 
In English | → International relations → Environmental protection  | 
| NACS | Nordic Association for China Studies | In English | → Associations → Area studies → China  | 
| NACUBO | National Association of College and University Business Officers (www.nacubo.org) | In English | → Associations → Education  | 
| NAD | Nicotinamide Adenine Dinucleotide | In English | → Genetics → Biochemistry, biophysics  | 
| NAD | Network Adapter Device | In English | → Computer hardware → Networks, communication  | 
| NADGE | NATO Air Defense Ground Environment | In English | → Military affairs → Military engineering  | 
| NADIR | Network Anomaly Detection and Intrusion Reporter | In English | → Software → Networks, communication  | 
| NADS | Norwegian Association for Defence Suppliers | In English | → Associations → Military engineering  | 
| NAEB | National Association of Educational Buyers | In English | → Associations → Education → 34745  | 
| NAEC | Northeast Asia Economic Conference | In English | → Economics | 
| NAEC | Naval Air Engineering Center | In English | → Aerodynamics → Aeronautics, aircraft  | 
| NAEP | National Assessment of Educational Progress | In English | → Education | 
| NAEP | National Association of Educational Procurement (www.naepnet.org) | In English | → Associations → Education → 34745  | 
| NAERIC | North American Equine Ranching Information Council | In English | → Organizations and associations → Agricultural sciences  | 
| NAES | National Association for Ethnic Studies | In English | → Associations → Ethnology  | 
| NAEYC | National Association for the Education of Young Children | In English | → Associations → Education  | 
| NAF | Nonappropriated Fund | In English | |
| NAFFAA | National Federation of Filipino American Associations | In English | → Organizations and associations | 
| NAFI | Nonappropriated Fund Instrumentality | In English | |
| NAFO | Northwest Atlantic Fisheries Organisation (www.nafo.int) | In English | → Organizations and associations → Fishing, hunting  | 
| NAFTA | North American Free Trade Agreement | In English | → International economic cooperation | 
| NaGe | National Geographic | In English | → Serial publications, periodicals → Area studies → Geography  | 
| NAGINELS | Non Aggressive Glass Internal Engraving Laser System | In English | → Engineering, technology | 
| NAGMC | National Association of Girls and Mixed Clubs | In English | → Associations | 
| NAHIS | National Animal Health Information System | In English | → Veterinary medicine | 
| NAHRA | North American Riding for the Handicapped Association | In English | → Associations → Riding  | 
| NAIA | National Animal Interest Alliance (www.naiaonline.org) | In English | → Organizations and associations → 5023  | 
| NAICS | North American Industry Classification System | In English | → Economics | 
| NAJAKS | Nordic Association for Japanese and Korean Studies | In English | → Associations → Language, linguistics, literature → Geography, biography, history  | 
| NAJS | Nordic Association for the Study of Contemporary Japanese Society | In English | → Associations → Language, linguistics, literature → Geography, biography, history  | 
| NAL | National Agricultural Library (www.nal.usda.gov) | In English | → Libraries → Agricultural sciences  | 
| NAM | National Association of Manufacturers | In English | → Associations → Engineering, technology  | 
| NAM | Nuclear Assessment Methodology | In English | → Nuclear technology | 
| NAM | North American Mesoscale (Model) | In English | → Meteorology, climatology | 
| NAMIC | News Agencies Multilingual Information Categorization | In English | → Knowledge management → Linguistics → Newspapers, journalism  | 
| NAMM | National Association of Music Merchants | In English | → Associations → Music  | 
| NAMS | North American Micropaleontology Section | In English | → Organizations and associations → Palaeontology  | 
| NANB | Nurses Association of New Brunswick | In English | → Associations → Medicine → Canada  | 
| NAO | North Atlantic Oscillation | In English | → Meteorology, climatology | 
| NAOJ | National Astronomical Observatory of Japan (https://www.nao.ac.jp/) | In English | → Observatories → Japan  | 
| NAOMI | North American OpenMath Initiative | In English | → Computer science → Mathematics  | 
| NAP | National Action Plan | In English | |
| NAP | National Allocation Plan | In English | |
| NAP | National Action Programme | In English | |
| NAP | Navigation Analysis Program | In English | → Vehicle engineering → Transport and postal services  | 
| NAPABA | National Asian Pacific American Bar Association | In English | → Associations → Law, jurisprudence  | 
| NAPCC | National Animal Poison Control Center | In English | → Organizations and associations → Pharmacology, toxicology → Veterinary medicine  | 
| NAPCTC | North American Policy Council for OSI (Open Systems Interconnection) Testing and Certification | In English | → Computer science | 
| NAPH | National Association of Professors of Hebrew (http://polyglot.lss.wisc.edu/naph/) | In English | → Associations → Education → Language, linguistics, literature  | 
| NAPPS | National Association of Professional Pet Sitters (www.petsitters.org) | In English | → Associations | 
| NAPQI | N-Acetyl-p-Benzoquinone Imine | In English | |
| NAR | Numerical Analysis Research | In English | → Computer-based techniques | 
| NAR | Nucleic Acids Research | In English | → Serial publications, periodicals → Biochemistry, biophysics  | 
| NAR | National Association of Realtors | In English | → Associations → Accommodation  | 
| NAREGI | National Research GRID Initiative (www.naregi.org) | In English | → Software → Networks, communication  | 
| NARME | Natural Resources Management and Ecological Engineering | In English | → Threats to the environment → Ecology  | 
| NARR | North American Regional Reanalysis | In English | → Meteorology, climatology | 
| NARS | National Archives and Record Services | In English | → Libraries → Records management  | 
| NARX | Nonlinear Auto-Regressive with eXogenous inputs | In English | |
| NAS | Numerical Aerodynamic Simulation | In English | → Computer simulation → Aerodynamics  | 
| NAS | National Academy of Sciences | In English | → Academies → Mathematics and natural sciences  | 
| NAS | Network Attached Storage | In English | → Networks, communication → Knowledge management  | 
| NAS | National Aircraft Standard | In English | → Standardization → Aeronautics, aircraft  | 
| NAS | National Airspace System | In English | → Aeronautics, aircraft → Astronautics  | 
| NAS | Naval Air Station | In English | → Public administration, government → Aeronautics, aircraft  | 
| NAS | Nonavionics Simulator | In English | → Computer simulation → Aeronautics, aircraft  | 
| NASA | Nordic Association for South Asian Studies | In English | → Associations → Language, linguistics, literature → Geography, biography, history  | 
| NASA | National Aeronautics and Space Administration (www.nasa.gov) | In English | → Central administration → Astronomy → Aeronautics, aircraft → Astronautics → United States  | 
| NASAC | NASA Conference Publication | In English | → Serial publications, periodicals → Astronomy → Astronautics → United States  | 
| NASAL | NASA Circular Letter | In English | → Serial publications, periodicals → Astronomy → Astronautics → United States  | 
| NASAR | NASA Reference Publication | In English | → Serial publications, periodicals → Astronomy → Astronautics → United States  | 
| NASAS | NASA Special Publication | In English | → Serial publications, periodicals → Astronomy → Astronautics → United States  | 
| NASCOM | NASA Communications | In English | → Telecommunications → Astronautics → United States  | 
| NASDA | National Space Development Agency | In English | → Central administration → Astronomy → Astronautics  | 
| NASDA | National Association of State Departments of Agriculture (www.nasda.org) | In English | → Associations → Regional administration → Agricultural sciences  | 
| NASDAQ | National Association for Security Dealers and Automatic Quotation | In English | → Associations → Finance  | 
| NASDAQ | National Association of Securities Dealers Automated Quotations | In English | → Associations → Financial markets  | 
| NASEAS | Nordic Association of Southeast Asian Studies | In English | → Associations → Language, linguistics, literature → Geography, biography, history  | 
| NASED | National Association of State Election Directors (www.nased.org) | In English | → Associations → Elections  | 
| NASIEC | Nasarawa State Independent Electoral Commission | In English | → Elections | 
| NASL | Nessus Attack Scripting Language | In English | → Programming languages | 
| NASM | National Air and Space Museum (www.nasm.si.edu) | In English | → Museums → Astronomy → Aeronautics, aircraft → Astronautics → United States  | 
| NASO | North American Space Operations | In English | → Astronomy → Astronautics  | 
| NASOH | North American Society for Oceanic History | In English | → Organizations and associations → Marine research, oceanography → History  | 
| NASP | National AeroSpace Plane | In English | → Aeronautics, aircraft → Astronautics  | 
| NASP | National Association of School Psychologists (www.nasponline.org) | In English | → Associations → Psychology → Education  | 
| NASS | North American Spine Society | In English | → Organizations and associations → Medicine  | 
| NASSH | North American Society for Sport History | In English | → Organizations and associations → History → Sport, physical exercises → United States  | 
| NASTRAN | NASA Structural Analysis Program | In English | → Mechanical engineering → Astronautics → United States  | 
| NAT | Nonconformance Action Team | In English | |
| NATF | Naval Air Test Facility | In English | → Aerodynamics → Aeronautics, aircraft  | 
| NatH | Natural History | In English | → Serial publications, periodicals → Biological sciences  | 
| NATMA | Nonlinear Analysis Theory Methods Applications | In English | → Serial publications, periodicals → Analysis  | 
| NATO | North Atlantic Treaty Organisation (www.nato.int) = OTAN | Organització del Tractat de l'Atlàntic Nord | In Catalan = OTAN | Organizazión d'o Tratau de l'Atlantico Norte | In Aragonese = OTAN | Organización del Tratáu del Atlánticu Norte | In Asturian = AFNA | Aozadur Feur-emglev Norzh-Atlantel | In Breton = OTAN | Organisation du Traité de l'Atlantique Nord | In French = ন্যাটো | উত্তর আটলান্টিক নিরাপত্তা জোট | In Bengali = NATO | Οργανισμός Βορειοατλαντικού Συμφώνου | In Greek = NATO | Nordatlantikvertrag-Organisation | In German = OTAN | Organización del Tratado del Atlántico Norte | In Spanish = NATO | Nord-Atlantika Traktat-Organizo | In Esperanto = NAFO | Noard-Atlantyske Ferdrachsorganisaasje | In Frisian = OTAN | Organización do Tratado do Atlántico Norte | In Galician = ნატო | ჩრდილოატლანტიკური თანამშრომლობის ორგანიზაცია | In Georgian = OTAN | Organização do Tratado do Atlântico Norte | In Portuguese = OTNA | Organizaciya le Tratatosko le Nordutne Atlantikosko | In Vlax Romani = OTAN | Organizaţia Tratatului Atlanticului de Nord | In Romanian = NATO | Organisatschoon vun den Noordatlantikverdrag | In Low German = NAVO | Noord-Atlantische Verdragsorganisatie | In Dutch  | 
In English | → International relations → Military affairs  | 
| NatPh | Nature Physics | In English | → Serial publications, periodicals → Mathematics and natural sciences  | 
| NATS | National Air Traffic Services (www.nats.co.uk) | In English | → Transport and postal services → Aeronautics, aircraft  | 
| NATSA | North American Taiwan Studies Association | In English | → Associations → Language, linguistics, literature → Geography, biography, history  | 
| Natur | Nature | In English | → Serial publications, periodicals → Mathematics and natural sciences  | 
| NATW | National Association of Town Watch | In English | → Associations | 
| NAUI | National Association of Underwater Instructors | In English | → Associations → Education  | 
| NAVA | North American Vexillological Association (www.nava.org) | In English | → Associations → Flags, banners  | 
| NAVAID | Navigation Aid | In English | → Vehicle engineering | 
| NAVCA | North American Veterinary College Administrators | In English | → Organizations and associations → Veterinary medicine  | 
| NAVDAD | Navigational Derived Air Data | In English | → Aeronautics, aircraft | 
| NAVP | National Association of Veterinary Physiotherapists (www.navp.org.uk) | In English | → Associations → Veterinary medicine  | 
| NAVP | National Association of Vision Professionals | In English | → Associations → Ophthalmology  | 
| NAVSAT | Navigation Satellite | In English | → Astronautics → Transport and postal services  | 
| NAVT | NASA Altimeter Verification Telemetry | In English | → Astronautics → United States  | 
| NAWIRA | North America West Indies Rugby Association | In English | → Associations → Football and rugby  | 
| NAYC | National Association of Youth Clubs | In English | → Associations | 
| NAYDP | National Arts & Youth Demonstration Project | In English | → Education → Arts  | 
| NB | National Body | In English | |
| NB | Narrow Band | In English | → Telecommunications | 
| NB | Navigation Base | In English | |
| NBA | Narrow-Band Amplifier | In English | → Telecommunications | 
| NBA | NSTS Berthing Adapter | In English | |
| NBC | Nuclear/Biological/Chemical | In English | → Military engineering | 
| NBDG | New Business Development Group | In English | |
| NBDL | Naval Bio-Dynamics Laboratory | In English | → Research institutes → Biological sciences  | 
| NBEP | Newfoundland Board of Examiners in Psychology | In English | → Organizations and associations → Psychology → Canada  | 
| NBF | Neutral Buoyancy Facility | In English | |
| NBIC | Nanotechnology, Biotechnology, Information Technology and Cognitive Science | In English | → Computer science → Biotechnology → Engineering, technology  | 
| NBMA | Nonbroadcast Multiple Access Network | In English | → Networks, communication → Telecommunications  | 
| NBN | Niue Business News | In English | → Newspapers, journalism | 
| NBOSS | New-Business Operations Support System | In English | |
| NBR | National Bureau of Asian Research | In English | → Research policy | 
| NBRP | National BioResource Project | In English | → Biological sciences | 
| NBS | National Bureau of Standards | In English | → Standardization | 
| NBS | Neutral Buoyancy Simulation | In English | |
| NBSAMRF | National Bureau of Standards, Advanced Research Facility | In English | → Research policy → Standardization  | 
| NBSO | Netherlands Bussiness Support Offices | In English | → Economics |