NS

NS as an abbreviation can mean:

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

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