List of acronyms: N explained

(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 http://www.nased.org http://www.disinfopedia.org/wiki.phtml?title=National_Association_of_State_Election_Directors_(NASED)
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 http://nass.org
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^[1]
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 https://web.archive.org/web/20121128115359/http://www.nichd.nih.gov/
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)
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 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

Notes and References

http://www.ncddr.org/ National Center for the Dissemination of Disability Research