SL may refer to:

Arts and entertainment

* SL (rapper), a rapper from London * ''

Second Life ''Second Life'' is an online multimedia platform that allows people to create an avatar for themselves and then interact with other users and user created content within a multi player online virtual world. Developed and owned by the San Fra ...

'', a multi-user 3D virtual world * Sensei's Library, an Internet site dedicated to the game of Go * Subdominant leittonwechselklänge * Leica SL, a mirrorless system camera by Leica Camera AG

Business and organizations

* Sociedad Limitada, the Spanish version of a private limited company

Politics

* Serbian Left (''Srpska levica''), a political party in Serbia * Stronnictwo Ludowe, a defunct Polish political party * Soyons Libres, a French political party

Transportation and vehicles

* SL Corporation, a Korean auto parts company *

Rio Sul Serviços Aéreos Regionais Rio-Sul Serviços Aéreos Regionais S/A was a regional airline headquartered in Rio de Janeiro, Brazil,"World Airline Directory." ''Flight International''. March 30, 1985112" Retrieved on July 23, 2009. operating scheduled services to southern B ...

(IATA code SL), a Brazilian airline *

Salt Lake City Southern Railroad The Salt Lake City Southern Railroad is a short-line railroad operating between Salt Lake City, and Murray, in Utah, United States. The SL began operating on April 19, 1993, as a RailTex subsidiary. Today the SL is a subsidiary of the Utah Rai ...

(reporting mark SL) * Stor-Oslo Lokaltrafikk, a public transport operator in Akershus, Norway *

Storstockholms Lokaltrafik Storstockholms Lokaltrafik, or more formally Aktiebolaget Storstockholms Lokaltrafik (Greater Stockholm Local Transit Company), is the organisation running all of the land based public transport systems in Stockholm County. It was previously k ...

, the public transport operator in Stockholm, Sweden * Thai Lion Air (IATA airline code SL) * Mercedes-Benz SL-Class, an automobile

Trade unions

* Association of Social Educators, a trade union in Denmark

Geography

Sierra Leone Sierra Leone,)]. officially the Republic of Sierra Leone, is a country on the southwest coast of West Africa. It is bordered by Liberia to the southeast and Guinea surrounds the northern half of the nation. Covering a total area of , Sierra ...

, in West Africa, ISO 3166 code *

Saarland The Saarland (, ; french: Sarre ) is a state of Germany in the south west of the country. With an area of and population of 990,509 in 2018, it is the smallest German state in area apart from the city-states of Berlin, Bremen, and Hamburg, and t ...

, a state of Germany * SL postcode area of the United Kingdom * Sungai Long, in Selangor, Malaysia

Language

* Sl (digraph), a Latin-script digraph *

Sign language Sign languages (also known as signed languages) are languages that use the visual-manual modality to convey meaning, instead of spoken words. Sign languages are expressed through manual articulation in combination with non-manual markers. Sign l ...

, used by deaf persons *

Slovene language Slovene ( or ), or alternatively Slovenian (; or ), is a South Slavic language, a sub-branch that is part of the Balto-Slavic branch of the Indo-European language family. It is spoken by about 2.5 million speakers worldwide (excluding spea ...

(ISO 639-1 code "sl")

Science, technology, and mathematics

Biology

* ''

Sensu lato ''Sensu'' is a Latin word meaning "in the sense of". It is used in a number of fields including biology, geology, linguistics, semiotics, and law. Commonly it refers to how strictly or loosely an expression is used in describing any particular c ...

'', a term used in taxonomy to mean "in the wider sense" of a definition *

Standard length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish ...

, a common measurement for fish * Abbreviation for × ''Sophrolaelia'', an orchid genus

Computing

* sl, a humorous command in some

Unix Unix (; trademarked as UNIX) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, whose development started in 1969 at the Bell Labs research center by Ken Thompson, Dennis Ritchie, a ...

-based systems that draws an animation of a steam locomotive, intended to be invoked as a typo of ls *

.sl .sl is the Internet country code top-level domain (ccTLD) for Sierra Leone. Request for use by Somaliland In 2020, the Minister of Telecommunication and Technology of the unrecognized state of Somaliland Somaliland,; ar, صوما� ...

, the country code top-level domain for Sierra Leone *

SL (complexity) In computational complexity theory, SL (Symmetric Logspace or Sym-L) is the complexity class of problems log-space reducible to USTCON (''undirected s-t connectivity''), which is the problem of determining whether there exists a path between two ver ...

, a class of computational complexity * Scientific Linux, a Linux distribution *

Service Loading A Push Proxy Gateway is a component of WAP Gateways that pushes URL notifications to mobile handsets. Notifications typically include MMS, email, IM, ringtone downloads, and new device firmware notifications. Most notifications will have an audib ...

, a variant of WAP push method

Mathematics

, a class of computational complexity *

sl (elliptic function) In mathematics, the lemniscate elliptic functions are elliptic functions related to the arc length of the lemniscate of Bernoulli. They were first studied by Giulio Carlo de' Toschi di Fagnano, Giulio Fagnano in 1718 and later by Leonhard Euler ...

, sine lemniscate function *

Special linear group In mathematics, the special linear group of degree ''n'' over a field ''F'' is the set of matrices with determinant 1, with the group operations of ordinary matrix multiplication and matrix inversion. This is the normal subgroup of the gen ...

in mathematics, denoted SL_n * Special linear Lie algebra, denoted

\mathfrak_n(F)

\mathfrak(n, F)

Other uses

Serjeant-at-law A Serjeant-at-Law (SL), commonly known simply as a Serjeant, was a member of an order of barristers at the English and Irish Bar. The position of Serjeant-at-Law (''servientes ad legem''), or Sergeant-Counter, was centuries old; there are w ...

, a former type of barrister in England and Ireland * '' Sine loco'' in bibliographies means that place of publication is unknown