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

Computing

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

Mathematics

 * Symmetric group or Sn
 * n-sphere or Sn
 * 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