List of acronyms: N
This list contains acronyms, initialisms, and pseudo-blends that begin with the letter N.
For the purposes of this list:
- acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
 - initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
 - pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
 
- (a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
 - (i) = initialism, e.g.: CD – (i) compact disc
 - (p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
 - (s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – megahertz)
 
Some terms are spoken as either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P.
N0–9
NA
- na – (s) Nauruan language (ISO 639-1 code)
 - nA – (s) Nanoampere
 - Na – (s) Sodium (Latin Natrium)
 - NA
- (s) Namibia (ISO 3166 digram)
 - (i) Narcotics Anonymous
 - National Archives
 - Negative Acknowledge
 
 - N/A
 - NAA – (p) N-Acetylaspartate
 - NAAD – (i) North American Air Defense
 - NAAFI
- (a) Navy, Army and Air Force Institute (UK)
 - (a) No Ambition And Fuckall Interest (RSA army slang)
 
 - NAAK – (a) Mark I NAAK, Nerve Agent Antidote Kit
 - NAACP – (i) National Association for the Advancement of Colored People ("N double-A CP")
 - NAAQS – (a) National Ambient Air Quality Standards
 - NAAWS – (i) NATO Anti-Air Warfare System
 - NABCI – (a) North American Bird Conservation Initiative ("nab-see")
 - NAC
- (i/a) National Agency Check
 - U.S. Naval Avionics Center
 - U.S. Navy Advanced Concepts
 - NOAD ADVENDO Combinatie, the full name of the Dutch football club NAC Breda
 - North Atlantic Council
 - Northern Area Command
 
 - NACA – (i) (U.S.) National Advisory Committee for Aeronautics (1915–1958, became NASA)
 - NACC – (i) North Atlantic Cooperation Council
 - NACISA – (a) NATO Communications and Information Systems Agency
 - NACMA – (p) NATO Air Command and Control System Management Agency
 - NACRA – (a) North America Caribbean Rugby Association (more specifically rugby union), a former name of Rugby Americas North
 - NACS – (i) North American Charging System, a charging connector standard for electric vehicles
 - NAD – (s) Namibian dollar (ISO 4217 currency code)
 - NAEC – (i) U.S. Naval Air Engineering Center
 - NAF
 - NAFLD – (i) NonAlcoholic Fatty Liver Disease
 - NAFO – (a) Northwest Atlantic Fisheries Organization
 - NAFERA – (a) Native American Free Exercise of Religion Act
 - NAFTA – (a) North American Free Trade Agreement
 - NAGPRA – (a) Native American Graves Protection and Repatriation Act
 - NAI
- (i) Named Area of Interest
 - Network Access Identifier
 
 - NAICS – (a) North American Industry Classification System
 - NAIL – (i) Neurotics Anonymous
 - NAILS – (a) National Airspace Integrated Logistics System
 - NAIRU – (a) Non Accelerating Inflation Rate of Unemployment
 - NAK – (p) Negative Acknowledge
 - NAM – (s) Namibia (ISO 3166 trigram)
 - NAMBLA – (a) North American Man-Boy Love Association
 - NAMRL – (i) Naval Aerospace Medical Research Laboratory
 - NaN – (i) Not A Number (computing)
 - NANP – (i) North American Numbering Plan (telephone)
 - NAO – (i) UK National Audit Office
 - NAPDD – (i) Non-Acquisition Program Definition Document ("nap-dee-dee")
 - NAPS – (a) Navy Acquisition Procedures Supplement
 - NARA – (i) (U.S.) National Archives and Records Administration
 - NARAL – (a) National Abortion Rights Action League
 - NARDAC – (a) Naval Regional Data Automation Center
 - NARDIC – (a) U.S. Navy Acquisition Research and Development Information Center
 - NARP – (a) Non-Athletic Regular Person
 - NARPV – (i) National Association for Remotely Piloted Vehicles
 - NAS
- (i) National Academy of Sciences
 - National Air Space
 - National Audubon Society
 - Naval Air Station
 - New Attack Submarine
 
 - NASA
 - NASB – (i) New American Standard Bible
 - NASCAR – (a) National Association for Stock Car Auto Racing
 - NASDAQ – (a) National Association of Securities Dealers Automated Quotations
 - NASED – (a) National Association of State Election Directors [1][2]
 - NASH – (a) Non-Alcoholic Steatohepatitis
 - NASP
 - NASS – (a) National Association of Secretaries of State [3]
 - NASUWT - National Association of Schoolmasters / Union of Women Teachers (UK trade union)
 - NatGeo - (a) National Geographic
 - NATO
 - nau – (s) Nauruan language (ISO 639-2 code)
 - NaUKMA – (p) National University of Kyiv-Mohyla Academy
 - nav – (s) Navajo language (ISO 639-2 code)
 - NAV – (p) Navigation[al]
 - NAVCAMS – (p) Naval Communications Area Master Station
 - NAVCC – (p) National Audio-Visual Conservation Center
 - NAVCC (Navy) – (p) Navy Component Commander
 - NAVCENT – (p) Naval Forces U.S. Central Command
 - NAVDAC – (p) Naval Data Automation Command
 - NAVEUR – (p) Naval Forces U.S. European Command
 - NAVFE – (p) U.S. Naval Forces, Far East
 - NAVFOR – (p) Naval Force
 - NAVMACS – (p) Naval Modular Automatic Communication Subsystem
 - NAVNET – (p) Navy Network
 - NAVS – (a) Non-Cooperative Airborne Vector Scoring
 - NAVSAT – (p) Navigation Satellite
 - NAVSPACECOM – (p) U.S. Navy Space Command
 - NAVSPASUR – (p) U.S. Naval Space Surveillance System
 - NAVSTAR – (p) Navigation Satellite Timing And Ranging
 - NAVTACNET – (p) Navy Tactical Network
 - NAWC – (i) U.S. Naval Air Warfare Center
 - NAWIRA – (a) North America and West Indies Rugby Association, the original name of the organization now known as Rugby Americas North
 - NAWMP – (a) North American Waterfowl Management Plan ("gnaw-wump")
 
NB
- nb – (s) Norwegian Bokmål language (ISO 639-1 code)
 - Nb – (s) Niobium
 - NB – (s) New Brunswick (postal symbol) – (i) nota bene (Latin, "mark well")
 - NBA – (i) National Basketball Association
 - NBACC – (i) U.S. National Biodefense Analysis and Countermeasures Center ("enn-back")
 - NBC – (i) National Broadcasting Corporation – Nuclear, Biological, and Chemical
 - NBCRS – (i) NBC (Nuclear, Biological, and Chemical) Reconnaissance System
 - NBIC – (i) Nanotechnology, Biotechnology, Information Technology, Cognitive Science
 - nbl – (s) Southern Ndebele language (ISO 639-2 code)
 - NBL – (a) National Basketball League (Australia)
 - NBT – (p) Nitroblue tetrazolium (assay)
 
NC
- nC – (s) Nanocoulomb
 - NC
- (i) Network Computer
 - (s) New Caledonia (ISO 3166 digram)
 - (i) Node Center
 - Nonconsensual
 - Normally Closed
 - (s) North Carolina (postal symbol)
 
 - NCA – (i) National Command Authority
 - NC3A or NC3A – (i) NATO Consultation, Command and Control Agency
 - NCAA – (i) National Collegiate Athletic Association ("NC double A")
 - NCAR – (i) U.S. National Center for Atmospheric Research
 - NCB – (i) National Codification Bureau
 - NCCAM – (i) U.S. National Center for Complementary and Alternative Medicine
 - NCCUSL – (i) National Conference of Commissioners on Uniform State Laws (U.S.)
 - NCDDR – (i) U.S. National Center for the Dissemination of Disability Research[1]
 - NCES
 - NCI – (i) U.S. National Cancer Institute
 - NCIS
- (i) National Criminal Intelligence Service (British)
 - Naval Criminal Investigative Service (U.S. Navy; see also NCIS, a U.S. TV series based on this unit)
 
 - NCL – (s) New Caledonia (ISO 3166 trigram)
 - NCLR – (i) National Council of La Raza
 - NCMO – (i) No Commitment Make Out
 - NCND
 - NCO – (i) Noncommissioned Officer
 - NCP – (i) Net Contracted Purchases
 - NCR – (i) National Cash Register Co.
 - NCTR – (i) Noncooperative Target Recognition
 - NCW – (i) Network Centric Warfare
 
ND
- nd – (s) Northern Ndebele language (ISO 639-1 code)
 - Nd – (s) Neodymium
 - N.D. – (i) Nobilis Domina (noble woman)
 - ND
- (i) Nondisclosure
 - (s) North Dakota (postal symbol)
 
 - NDA - (i) Non-Disclosure Agreement
 - NDAA – (i) U.S. National Defense Authorization Act
 - NDBP – (i) Non-Departmental Public Body (Scotland)
 - NDC - (i) National Drug Code
 - NDCC – (i) New Directions Counseling Center (Concord, California)
 - nde – (s) Northern Ndebele language (ISO 639-2 code)
 - NDH
- (i) Neue Deutsche Härte (German, "new German hardness"—heavy metal genre)
 - Nezavisna Država Hrvatska (Croatian, "Independent State of Croatia"—Nazi puppet state)
 
 - ndo – (s) Ndonga language (ISO 639-2 code)
 - N-dof or NDOF – (i) Number of Degrees of Freedom
 - NDP – (i) New Democratic Party (Canada)
 - NDS – Nintendo DS
 - NDU – (i) National Defense University (Washington, DC)
 
NE
- ne – (s) Nepali language (ISO 639-1 code)
 - Ne – (s) Neon
 - NE
- (s) Nebraska (postal symbol)
 - Niger (ISO 3166 digram)
 - (i) North-East
 
 - NEA
- (i) National Education Association (U.S. labor union)
 - Near-Earth Asteroid
 - Nuclear Energy Agency (OECD)
 
 - NEAT
- Near-Earth Asteroid Tracking - (a)
 - National Emergency Access Target (a) (Au Health)
 
 - NEC
- (i) Network-enabled capability
 - Nijmegen Eendracht Combinatie (Dutch, "Nijmegen Unity Combination"; football club formed by the 1910 merger of the Nijmegen and Eendracht clubs)
 - Nippon Electric Company, the original English-language name of the company now known as NEC
 - (p) Northeast Conference (U.S. college sports)
 
 - NED – (s) Netherlands (IOC and FIFA trigram, but not ISO 3166)
 - NECTEC – (a) National Electronics and Computer Technology Center (Thailand)
 - NEI
- (i) National Eye Institute
 - Not Enough Information
 - Nuclear Energy Institute
 
 - NEIC (i)
- 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 – (p) nemine contradicente (Latin, "no one contradicting")
 - nem diss – (p) nemine dissentiente (Latin, "no one dissenting")
 - NEMS – (i) National Energy Modeling System (USDOE-EIA)
 - NEO
 - nep – (s) Nepali language (ISO 639-2 code)
 - NEPA – (a) National Environmental Policy Act
 - NER – (s) Niger (ISO 3166 trigram)
 - NERF - (a) Non-Expanding Recreational Foam
 - NERICA – (p) New Rice for Africa
 - NESDIS – (a) National Environmental Satellite, Data and Information Service
 - NESP – (i) NSA/CSS Enterprise Standards Program
 - NESS-T – (p) Near-Earth Space Surveillance – Terrestrial project
 - NET
- (i) National Educational Television
 - (i/a) NCAA Evaluation Tool, a metric used in the NCAA Division I men's and women's basketball tournament selection process
 
 - NETCU – (i) (UK) National Extremism Tactical Co-ordination Unit
 - NETL – (a) (US) National Energy Technology Laboratory
 - NETWARS – (p) Network Warfare Simulation
 - NEWHA – (i) New England Women's Hockey Alliance
 - NEWS
- (a) Navy Electronic Warfare Simulator
 - North, East, West, South
 
 - NEX – (p) Navy EXchange
 
NF
- nF – (s) Nanofarad
 - NF
- (s) Newfoundland (and Labrador) (obsolete postal code, replaced by NL)
 - Norfolk Island (ISO 3166 digram)
 
 - NFA
- (i) (U.S.) National Firearms Act (often used to refer to the guns and accessories regulated under this law)
 - No-Fire Area
 
 - NFC
 - NFER – (i) National Foundation for Educational Research
 - NFG – (i) No F**king Good
 - NFHS – (i) National Federation of State High School Associations
 - NFI – (i) Not F****** Interested
 - NFK – (s) Norfolk Island (ISO 3166 trigram)
 - NFL
- (i) National Football League
 - National Forensic League, original name of the National Speech and Debate Association
 - No-Fire Line
 
 - Nfld – (p) Newfoundland
 - NFPA – (a) National Fluid Power Association (United States)
 - NFT
- (p) Neurofibrillary tangle
 - (i) No Further Text
 - Non-fungible token
 
 - NFS
 
NG
- ng – (s) Nanogram – Ndonga language (ISO 639-1 code)
 - NG
- (i) Natural Gas
 - Next Generation
 - (s) Niger (FIPS 10-4 country code)
 - Nigeria (ISO 3166 digram)
 
 - NGA
- (i) National Geospatial-Intelligence Agency
 - (s) Nigeria (ISO 3166 trigram)
 
 - NGH – Northern General Hospital
 - ngl – (i) Not gonna lie
 - NGATS – (i) New Generation Army Targetry System
 - NGIC – (a) National Ground Intelligence Center ("Injick")
 - NGN – (s) Nigerian naira (ISO 4217 currency code)
 - NGO – (i) non-governmental organization
 - NGR – (s) Nigeria (IOC trigram, but not ISO 3166 or FIFA)
 - NGS – (i) Naval Gunfire Support
 
NH
- nH – (s) Nanohenry
 - NH – (s) New Hampshire (postal symbol) – New Hebrides (ISO 3166 digram; obsolete 1980) – Vanuatu (FIPS 10-4 country code; from New Hebrides)
 - N.H. – (i) Nobilis Homo (noble man)
 - NHANES – (i) National Health and Nutrition Examination Survey
 - NHB – (s) New Hebrides (ISO 3166 trigram; obsolete 1980)
 - NHB – (i) No holds barred
 - NHL – (i) National Hockey League
 - NHO – (i) Næringslivets Hovedorganisasjon (Confederation of Norwegian Enterprises, a Norwegian employers' organisation)
 - NHRA – (i) National Hot Rod Association
 - NHS – (i) National Health Service (UK)
 
NI
- Ni – (s) Nickel
 - NI
 - NIAAA – (i) U.S. National Institute on Alcohol Abuse and Alcoholism
 - NIAID – (a) National Institute of Allergies and Infectious Disease
 - NIAG – (a) NATO Industrial Advisory Group
 - NIAMD – (i) National Institute of Arthritis and Musculoskeletal Diseases
 - NIB – (i) New In Box (Internet auction/trading listings)
 - NIBP – (i) Non-invasive blood pressure monitor
 - NIC
- (a) Network Interface Card
 - (s) Nicaragua (ISO 3166 trigram)
 
 - NicA – (i) Nicotine Anonymous
 - NICAP – (a) National Investigations Committee on Aerial Phenomena
 - NICE – (p) UK. National Institute for Health and Clinical Excellence
 - NICHD – National Institute of Child Health and Human Development [4]
 - NICP – (i) National Inventory Control Point
 - NIDDK – (i) National Institute of Diabetes and Digestive and Kidney Diseases
 - NIDRR – (i) National Institute on Disability Research and Rehabilitation
 - NIEHS – (i) National Institute of Environmental Health Sciences
 - NIG – (s) Niger (IOC and FIFA trigram, but not ISO 3166)
 - NIH
 - NIIN – (i) National Item Identification Number
 - NIL
- (i) Name, image, and likeness (referring to U.S. student athlete compensation)
 - (p) Nanoimprint lithography
 - (i) Nomina im Indogermanischen Lexikon (German, "Nominals in the Indo-European Lexicon") – etymological dictionary of Proto-Indo-European nominals
 
 - NIMA – (a) National Imagery and Mapping Agency (became NGA)
 - NIMBY – (a) Not In My Back Yard (See NOME)
 - NIMG – (i) Not In My Generation
 - NiMH – (p) nickel metal hydride ("Ni" is the chemical symbol for nickel)
 - NIMH
 - NIN – (i) Nine Inch Nails (band)
 - NIO – (s) Nicaraguayan cordoba oro (ISO 4217 currency code)
 - NIOSH – (a) National Institute for Occupational Safety and Health (U.S.)
 - NIPR – (i) National Institute of Polar Research (Japan)
 - NIPT - Non-Invasive Prenatal Testing
 - NIR – (s) Northern Ireland (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
 - NISAC – (a) U.S. National Infrastructure Simulation and Analysis Center
 - NISCAP – (a) NSA Information System Certification and Accreditation Program
 - NISER – (i) National Institute of Science Education and Research
 - NIST – (a/i) National Institute of Standards and Technology
 - NIT
- (i) National Invitation Tournament (U.S. college basketball)
 - (i) National Institutes of Technology (India)
 
 - NITFS – (i) National Imagery Transmission Format Standard
 - NIU – (s) Niue (ISO 3166 trigram)
 - NIV
- (i) New International Version (Bible translation)
 - Non-invasive ventilation
 
 
NJ
- nJ – (s) Nanojoule
 - NJ – (s) New Jersey (postal symbol)
 - NJHS – (s) National Junior Honor Society
 - NJPW – (i) New Japan Pro-Wrestling
 
NK
- nK – (s) Nanokelvin
 - NKA – No Known Allergies
 - N/K/A – Now Known As
 - NKJV – (i) New King James Version (Bible translation)
 - NKVD – (i) Narodnyi Komissariat Vnutrennikh Del (Russian "People's Commissariat of Internal Affairs") (1934–1954)
 
NL
- nl – (s) Dutch language (ISO 639-1 code)
 - nL – (s) Nanolitre
 - NL
- (s) Netherlands (ISO 3166 and FIPS 10-4 country code digram)
 - Newfoundland and Labrador (postal symbol)
 
 - NLB – (i) Non-Linear Battlefield
 - nld – (s) Dutch language (ISO 639-2 code)
 - NLD – (s) Netherlands (ISO 3166 trigram)
 - NLF – (i) National Liberation Front (disambiguation)
 - NLL – (i) National Lacrosse League
 - NLIC - (p) NetLicensing (license file extension)
 - NLOS-LS – (i) Non Line Of Sight-Launch System
 - NLP
- (i) Natural Language Processing
 - Neuro-Linguistic Programming (pseudoscience)
 
 - NLW – (i) Non-Lethal Weapon
 
NM
- nm – (s) nanometer
 - nm, NM – Nautical mile
 - N·m, Nm – Newton meter
 - NM – (s) New Mexico (postal symbol)
 - NMCI – (i) Navy Marine Corps Intranet
 - NMCS – (i) Not Mission Capable Supply (SM&R code)
 - NMD – (i) U.S. National Missile Defense
 - NMN – (i) No middle name
 - NMOS – (i/a) N-type/Negative Metal-Oxide-Semiconductor transistor ("enn-moss")
 - NMSG – (i) NATO Modelling and Simulation Group
 - NMR – (i) Nuclear Magnetic Resonance
 - NMHNFG – (i) Not Made Here, No Fucking Good
 
NN
- nn – (s) Norwegian Nynorsk language (ISO 639-1 code)
 - nN – (s) Nanonewton
 - NNW – (i) North North-East
 - nno – (s) Norwegian Nynorsk language (ISO 639-2 code)
 - NNSA – (i) U.S. National Nuclear Security Administration
 - NNW – (i) North North-West
 
NO
- no – (s) Norwegian language (ISO 639-1 code)
 - No – (s) Nobelium
 - NO
- (s) Nitric Oxide
 - (i) Normally Open
 - (s) Norway (ISO 3166 and FIPS 10-4 country code digram)
 
 - NOAA – (a) U.S. National Oceanic and Atmospheric Administration
 - NOAF – (i) Norwegian Air Force
 - NOAO – (i) National Optical Astronomy Observatory
 - nob – (s) Norwegian Bokmål language (ISO 639-2 code)
 - NOC – (i) UK. National Oceanography Centre
 - NODEF – (a) NATO Oceanographic Data Exchange Format
 - No-FEAR – (p) Notification and Federal Employee Antidiscrimination Retaliation Act (2002)
 - NOK – (s) Norwegian krone (ISO 4217 currency code)
 - NOLA – (p) New Orleans, Louisiana (LA is the official postal code for Louisiana)
 - NOGI – (a) New Orleans Grande Isle (award for diving)
 - NOLF – (i) Navy OutLying Field
 - NOM – (i) Novus Ordo Missae or New Ordinary of the Mass (sometimes abbreviated to simply "NO")
 - NOME – Not on Mars Either
 - NoMBO – (p) Non-mine, Mine-like Bottom Object
 - NOME – Not on Mars Either (see NIMBY)
 - NOPA – (i) National Office Products Alliance – National Office Products Association
 - nor – (s) Norwegian language (ISO 639-2 code)
 - NOR – (s) Norway (ISO 3166 trigram)
 - NORAD – (p) North American Aerospace Defense Command
 - NORCECA – (p) North, Central America and Caribbean Volleyball Confederation
 - NORELPREF – No religious preference
 - NORML – (a) National Organization for the Reform of Marijuana Laws ("normal")
 - NORTHAG – (p) Northern Army Group
 - NOS
- (i) Network Operating System
 - New Old Stock (Internet auction/trading listings)
 - Nitric Oxide Synthase (enzyme)
 
 - NOSA – (i) NATO OSI Security Architecture
 - NOTAFLOF – (a) No One Turned Away For Lack Of Funds
 - NOTAM – (p) Notice to Airmen
 - NOW – (a) National Organization for Women
 
NP
- Np
 - NP
- (s) National Permit (authorization used in India to allow trucks to go anywhere in the nation)
 - Nepal (ISO 3166 and FIPS 10-4 country code digram)
 
 - NPB – (i) Nippon Professional Baseball
 - NPC
- (i) National Postgraduate Committee
 - National Provincial Championship (New Zealand rugby competition)
 - Navigation Planning Chart
 - Non-Player Character (role-playing games)
 
 - NPCS – (i) Non-Passenger Coaching stock (in Railways)
 - NPD – (i) Nationaldemokratische Partei Deutschlands (German)
 - NPDI – (i) New Product Development and Introduction
 - NPG – (i) Needline/Network Participation Group
 - NPH – (i) Normal Pressure Hydrocephalus
 - NPL
- (i) National Priorities List
 - (s) Nepal (ISO 3166 trigram)
 
 - NPPU - Nose Personal Protection Unit (copper nose insert)
 - NPOV – (i) Neutral Point Of View
 - NPR
- (i) National Public Radio
 - (s) Nepalese rupee (ISO 4217 currency code)
 
 
NQ
- NQ – (s) Dronning Maud Land (ISO 3166 digram; obsolete 1983)
 - NQOCD – (i) Not Quite Our Class, Dear (or Darling). (Upper-class English slang)
 - NPO – nothing by mouth
 
NR
- nr – (s) Southern Ndebele language (ISO 639-1 code)
 - NR – (s) Nauru (ISO 3166 and FIPS 10-4 country code digram)
 - NRA
 - NRAO – (i) National Radio Astronomy Observatory
 - NRC
- (i) National Register of Citizens (India)
 - National Research Council (U.S.)
 - Nuclear Regulatory Commission (U.S.)
 
 - NRDC – (i) (U.S.) Natural Resources Defense Council
 - NREL – (i) U.S. National Renewable Energy Laboratory
 - NRK – (p) Norsk Rikskringkasting (Norwegian Broadcasting Corporation)
 - NRLA – (i) New Railway Link through the Alps
 - NRMP – (i) National Resident Matching Program (U.S. medicine)
 - NRO – (i) U.S. National Reconnaissance Office
 - NRT – (i) Near Real Time
 - NRTA
- (i) National Retail Tenants Association
 - National Retired Teachers Association
 - Northwest Regional Transmission Association
 
 - NRU – (s) Nauru (ISO 3166 trigram)
 
NS
- ns – (s) Nanosecond
 - nS – (s) Nanosiemens
 - NS
- (s) Norfolk Southern Railway (AAR reporting mark)
 - Nova Scotia (postal symbol)
 - Suriname (FIPS 10-4 country code)
 
 - NSA
- (i) U.S. National Security Agency
 - Naval Support Activity
 - No Strings Attached
 
 - NSABB – (i) National Science Advisory Board for Biosecurity
 - NSAID – (i) Non-Steroidal Anti-Inflammatory Drug
 - NSB – (i) Norges Statsbaner (Norwegian State Railways)
 - NSBM – (i) National Socialist black metal
 - NSC – National Security Council
 - NSDA – (i) National Speech and Debate Association (US)
 - NSDAP – (i) Nationalsozialistische Deutsche Arbeiterpartei (German: "German National Socialist Workers Party", the formal name of the Nazi Party)
 - NSDL – (i) National Science Digital Library (US)
 - NSG – (i) National System for Geospatial-Intelligence
 - NSN – (i) National Stock Number
 - NSNA – (i) National Student Nurses' Association
 - NSO – (i) National Standardization Office (ABCA)
 - NSS – (i) (U.S.) Naval Simulation System
 - NST – (i) (UK) Nimrod Software Team
 - NSTAC – (i) National Security Telecommunications Advisory Committee
 - NSV – (i) Nikitin-Sokolov-Volkov heavy machine gun (Russian НСВ Никитина-Соколова-Волкова) ru:ПулеметНСВ-12,7 "Утес"
 - NSW – (i) New South Wales (postal symbol)
 
NT
- N/T – (Aa) No text
 - nT – (s) Nanotesla
 - NT
- (i) National Trust (UK)
 - (s) Saudi–Iraqi neutral zone (ISO 3166 digram; obsolete 1993)
 - (i) New Technology (Windows NT)
 - (s) Northern Territory (Australia) (postal symbol)
 - Northwest Territories (Canada) (postal symbol)
 
 - NTC
- (i) National Training Center
 - Negative Temperature Coefficient (thermistor)
 
 - NTDS – (i) Naval Tactical Data System
 - NTP – (i) Network Time Protocol
 - NTR – (i) Network Time Reference
 - NTRA – (i) National Thoroughbred Racing Association
 - NTSB – (i) National Transportation Safety Board
 - NTSC – (i) National Television Standards Committee (colloquially, Never Twice the Same Color)
 - (i) (Internet Abbreviation:) Nothing To See Here
 - NTV – (i) Non-Tactical Vehicle
 - NTY – (i) (Internet Abbreviations:) Not Tested Yet; (Alternatively) No Thank You
 - NTZ – (s) Iraq-Saudi Arabia Neutral Zone (ISO 3166 trigram; obsolete 1993)
 
NU
- NU
 - NUI – (a) No user interface ("noo-ey")
 - NUL
- (i) Null character (ASCII code of control character)
 - National Urban League
 
 - NUTS – (a) Nuclear Utilization Target Selection
 - NUWC – (i) U.S. Naval Undersea Warfare Center
 
NV
- nv – (s) Navajo language (ISO 639-1 code)
 - nV – (s) Nanovolt
 - NV
- (i) Naamloze vennootschap (Dutch, "innominate partnership" or "anonymous venture"; i.e. a public limited-liability company)
 - (s) Nevada (postal symbol)
 
 - NVEOL – (i) Night Vision and Electro-Optics Laboratory
 - NVESD – (i) CERDEC Night Vision and Electronic Sensors Directorate, Fort Belvoir, Virginia
 - NVG – (i) Night Vision Goggles
 - NVL – (i) Night Vision Laboratory
 
NW
- nW – (s) Nanowatt
 - NW – (s) North-West
 - NW – (i) Nuclear Weapon
 - NWA – (i) National Wrestling Alliance
 - NWF – (i) National Wildlife Federation
 - NWFZ – (i) Nuclear-Weapon-Free Zone
 - NWHN – (i) U.S. National Women's Health Network
 - nWo – (i) New World Order (see article for explanation of idiosyncratic capitalization)
 - NWOAHM – (i) New Wave of American Heavy Metal
 - NWOBHM – (i) New wave of British heavy metal (sometimes pronounced /nəˈwɒbəm/ as if it were an acronym)
 - NWRA – (i) National Wildlife Rehabilitators Association
 - NWSL - (i) National Women's Soccer League (U.S.)
 - NWT – (i) North-West Territories
 
NX
- NX
- (p) Part of computer memory marked as "no execute"
 - (i) Automobile made by Nissan
 - (s) unit of illuminance
 - (p) National Express
 - Net exports
 
 - NXA – (i) 21st arcade game in the Pump It Up series
 - NXD – (p) Native XML
 - NXE – (i) New Xbox Experience
 - NXG – (p) New Cross Gate station
 - NXL – (i) National XBall League
 - NXN – (p) Nike Cross Nationals
 - NXP – (p) "Next Experience" Semiconductors
 
NY
- ny – (s) Chichewa language (ISO 639-1 code)
 - NY – (s) New York (postal symbol)
 - nya – (s) Chichewa language (ISO 639-2 code)
 - NYHA – (i) New York Heart Association
 - NYO – (i) National Youth Orchestra of Great Britain
 - NYRA
- (i) National Youth Rights Association
 - (a) New York Racing Association (horse racing)
 
 - NYSE – (i) New York Stock Exchange
 - NYT (disambiguation) – (i) The New York Times
 
NZ
- NZ – (s) New Zealand (ISO 3166 and FIPS 10-4 country code digram)
 - NZC – (i) New Zealand Cricket
 - NZD – (s) New Zealand dollar (ISO 4217 currency code)
 - NZL – (s) New Zealand (ISO 3166 trigram)
 - NzL – Noze looan (online/event listings)
 - NZOSS – (i) New Zealand Open Source Society
 - NZR
- (i) New Zealand Railways
 - New Zealand Rugby (governing body for rugby union)
 
 - NZRU – (i) New Zealand Rugby Union, the former name of the organisation now known as New Zealand Rugby