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.

(Main list of acronyms)

• n – (s) Nano
• N – (s) Newton – Nitrogen – North

N0–9

• N3F – (i) National Fantasy Fan Federation

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
  • (i) Neurotics Anonymous
  • not available/applicable
• 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
• NAD – (s) Namibian dollar (ISO 4217 currency code)
• NAEC – (i) U.S. Naval Air Engineering Center
• NAF
  • (a) NATO Architecture Framework
  • (i) Naval Air Facility
• 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
  • (a) National Aeronautics and Space Administration
  • North American Saxophone Alliance
• 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
  • (p) National Aerospace Plane
  • (i) National Archery in the Schools Program
• 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
  • (a) National Association of Theatre Owners
  • North Atlantic Treaty Organization
• 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
• NCES
  • (i) U.S. National Center for Education Statistics
  • Net-Centric Enterprise Services
• 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
  • (i) Noncircumvention and Nondisclosure
  • (i) Neither Confirm Nor Deny
• 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
  • (i) Near-Earth Object
  • Non-combatant Evacuation Operations
• 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
  • (i) National Football Conference
  • Near-field communication
• 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
  • (i) Network File System

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
  • (s) Nicaragua (ISO 3166 digram)
  • Nigeria (FIPS 10-4 country code)
• 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
  • (i) National Institutes of Health
  • Not Invented Here
• 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
  • (i) National Institute of Medical Herbalists
  • National Institute of Mental Health
• 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
  • (p) Neap tide (nautical charts)
  • (s) Neptunium
• 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 – (i) National Rifle Association of America
• 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
  • (s) Nicaragua (FIPS 10-4 country code)
  • Niue (ISO 3166 digram)
  • Nunavut (postal symbol)
• 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