SN
# SN

SN, Sn, sn, .sn, or s.n. may refer to:

## Businesses and organizations

* Brussels Airlines (IATA code SN)
   * Sabena
   * SN Brussels Airlines (IATA code SN)
* Servant of the People (Sluha Narodu)
* Slovaks Forward (Slovaci napred), a political party in Serbia
* Standards Norway, the main standards organization of Norway
* Stronnictwo Narodowe (National Party), a Polish political party
* Supreme Court of Poland (Sąd Najwyższy), the court of last resort for non-administrative matters

## Places

* Senegal (ISO country code SN)
* Shaanxi, a province of China (Guobiao abbreviation SN)
* South Sulawesi, a province of Indonesia (ISO 3166-2:ID code)
* Saxony, a state of Germany
* SN postcode area, the UK postcode district containing Swindon and much of North Wiltshire

## Religion

* Samyutta Nikaya or SN, a Buddhist scripture
* Sutta Nipata or Sn, a Buddhist scripture

## Science, technology, and mathematics

### Computing

* .sn, the country-code top level domain of Senegal
* sn, the surname attribute of the Lightweight Directory Access Protocol

### Mathematics

* Symmetric group or $S_n$
* n-sphere or $S^n$
* sn (elliptic function), one of Jacobi's elliptic functions

### Meteorology

* SN, METAR code for snow
* Spotter Network, a system for reporting location and severe weather observations of storm spotters and chasers

### Other uses in science and technology

* Savin–Norov machine gun
* Space Network, a NASA relay satellite system
* Stereospecific numbering in compounds such as glycerophospholipids
* Sthene, an obsolete unit of force or thrust in the metre-tonne-second system of units
* Substantia nigra, a brain structure
* Supernova, a stellar explosion, in astronomy and cosmology
* Tin, symbol Sn, a chemical element

## Other uses

* Seaman, abbreviation for the United States Navy rank
* Serial number, in component tracking
* Shona language (ISO 639 alpha-2 code "sn")
* Sine nomine or s.n., a Latin term for "without a name"
* Spanish Navy
* Abbreviation for Sportsnet, a Canadian sports specialty channel
