# NS

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