NS as an abbreviation can mean:

Arts and entertainment

Gaming

  • Natural Selection (video game), a mod for the game Half-Life
  • NetStorm: Islands At War, a real-time strategy game published in 1997 by Activision
  • Nintendo Switch, a hybrid video game console and handheld.
  • NationStates, a web-based simulation game

Literature

  • New Spring (known to fans as "NS"), a 1999 anthology edited by Robert Silverberg and derivative 2004 novella by Robert Jordan
  • NS-series robots from the book I, Robot

Companies

  • National Semiconductor (also known as "Natsemi"), an American integrated circuit design and manufacturing company
  • Nederlandse Spoorwegen, the main public transport railway company in the Netherlands
  • Norfolk Southern Railway, a major Class I railroad in the United States, owned by the Norfolk Southern Corporation
  • Norfolk Southern Railway (1942–1982), the final name of a railroad running in Virginia and North Carolina before its acquisition by the Southern Railway in 1974

Government and politics

  • Nasjonal Samling, a 1930s Norwegian national socialist political party
  • National Security Department (noted as NS), a law enforcement agency in Hong Kong
  • National service, a name for the conscription system of some militaries
  • National Socialism or Nazism, the ideology held by, among other political parties, the National Socialist German Workers Party
  • New Serbia (political party) (Nova Srbija), a political party in Serbia
  • People's Party (Serbia, 2017) (Narodna stranka), a political party in Serbia
  • New Slovenia (also known as Nova Slovenija - Krscanski Ljudska Stranka), a right-of-centre political party in Slovenia
  • People's Party (Montenegro) (Narodna Stranka), a political party in the Republic of Montenegro
  • National Alliance (Lithuania) (Nacionalinis susivienijimas), a political party in Lithuania

Places

  • Negeri Sembilan, one of the fourteen states in Malaysia
  • Novi Sad, a city in Serbia (license plate code)
  • Nova Scotia, as the official Canadian postal abbreviation for the province

Science and technology

Biology and medicine

  • Nervous system, the system of neurons that coordinates the actions of an organism
  • Normal saline, a solution of sodium chloride used in intravenous drips

Computing

  • Name server, a computer server that implements a name service protocol
  • NS record, a DNS record type
  • Namespace, an abstract container used in computing
  • Neighbor Solicitation, part of IPv6's Neighbor Discovery Protocol
  • NeXTSTEP, an object-oriented, multitasking operating system by NeXT, as well as a prefix for certain system-provided classes in the operating system, such as "NSString"
  • ns (simulator) (or "ns-2"), an open source network simulator

Mathematics

  • ns (elliptic function), one of Jacobi's elliptic functions
  • NS, the Néron–Severi group

Other uses in science and technology

  • Nanosecond (abbreviated "ns"), a measure of time
  • Nanostructure
  • Neutron star, a star formed from the collapsed remnant of a massive star
  • New Shepard 3 (NS3), a reusable launch vehicle from Blue Origin, being tested in 2017-18
  • Newton second, the SI derived unit for momentum
  • Not significant, when differences between categories are smaller than the amount of error/noise in the data, see Statistical significance
  • Nuclear Ship (NS), a ship prefix for civilian ship names
  • Norsk Standard, Norwegian Standard, Standards defined by Standard Norge

Other uses

  • National school (Ireland), a type of school
  • New Style (as "N.S." in opposition to Old Style as "O.S."), indicating either a date in the Julian Calendar with the start of year adjusted to 1 January, or a date in the Gregorian calendar