SF may refer to:

Locations

San Francisco San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...

, California, United States *

Sioux Falls, South Dakota Sioux Falls ( ) is the List of cities in South Dakota, most populous city in the U.S. state of South Dakota and the List of United States cities by population, 117th-most populous city in the United States. It is the county seat of Minnehaha Coun ...

, United States *

Sidi Fredj Sidi Fredj, known under French rule as Sidi Ferruch, is a coastal town in Algiers Province, Algeria. It is located within the territory of the Staouéli, municipality of Staouéli, on a presque-isle on the Mediterranean Sea. Obori was impor ...

, Algeria *

South Florida South Florida, sometimes colloquially shortened to SoFlo, is the Regions of the United States#Florida, southernmost region of the U.S. state of Florida. It is one of Florida's three most commonly referred to directional regions; the two others are ...

, an urban region in the United States * Suomi Finland, former vehicular country code for Finland

In arts and entertainment

Genres

Speculative fiction Speculative fiction is an umbrella term, umbrella genre of fiction that encompasses all the subgenres that depart from Realism (arts), realism, or strictly imitating everyday reality, instead presenting fantastical, supernatural, futuristic, or ...

(usually ''sf'') **

Science fiction Science fiction (often shortened to sci-fi or abbreviated SF) is a genre of speculative fiction that deals with imaginative and futuristic concepts. These concepts may include information technology and robotics, biological manipulations, space ...

or sci-fi (usually ''SF'')

In film and television

Svensk Filmindustri SF Studios is Sweden’s largest film studio. It is involved in production, distribution, and movie theater market chains (both Swedish and international, including American) with headquarters in Stockholm and local offices in Oslo, Copenhagen ...

, the Swedish film industry **

SF Film Finland SF Film Finland Oy (formerly FS Film Oy) is a Finnish film distributor established in 2000. It is part of Bonnier Group and a subsidiary of AB Svensk Filmindustri. SF Film Finland is the leading film distributor in Finland, with market shares o ...

, a Finnish film distributor *

SF Channel (Australia) SF (formerly Sci Fi Channel) was an Australian subscription television, subscription channel that aired science fiction, fantasy and related programs. It was available on Foxtel, Austar and Optus Television subscription platforms. In 2012, the ...

Schweizer Fernsehen Schweizer Fernsehen (SF; "Swiss Television") was the German-language division of SRG SSR, in charge of production and distribution of television programmes in Switzerland for German-speaking Switzerland. It had its head office in Zürich.

, a German-language television network in Switzerland *

Suomen Filmiteollisuus Suomen Filmiteollisuus (SF), lit. ''Finland's Film Industry'', is a Finland, Finnish film production company founded by Erkki Karu in 1933 after financial problems with Suomi-Filmi. The CEO, director, producer and writer Toivo Särkkä, T.J. Sär ...

, a Finnish film production company

In music

Sforzando (musical direction) In music, the dynamics of a piece are the variation in loudness between notes or phrases. Dynamics are indicated by specific musical notation, often in some detail. However, dynamics markings require interpretation by the performer depending o ...

or sf, a musical accent *''Subito forte'', a musical notation for

dynamics (music) In music, the dynamics of a piece are the variation in loudness between notes or phrases. Dynamics are indicated by specific musical notation, often in some detail. However, dynamics markings require interpretation by the performer dependin ...

Switchfoot Switchfoot is an American rock music, rock band from San Diego, California. The band's members are Jon Foreman (lead vocals, guitar), Tim Foreman (bass guitar, backing vocals), Chad Butler (drum kit, drums, percussion), and Jerome Fontamillas (g ...

, a band *Sasha Fierce, on-stage alter ego of American entertainer Beyoncé, and namesake of her album '' I Am... Sasha Fierce''

Other media

Saikoro Fiction ''Saikoro Fiction'' (, "Dice Fiction"; abbreviated "SF") is a Japanese role-playing game universal Role-playing game system, system developed by and presented by (''Bouken Kikaku-Kyoku''). Core mechanics Saikoro Fiction requires one or more ...

, a Japanese role-playing game system *''

Street Fighter is a Media mix, Japanese media franchise centered on a series of fighting games developed and published by Capcom. Street Fighter 1, The first game in the series was released in 1987, followed by List of Street Fighter video games, six other ma ...

'', a series of fighting video games by Capcom

Businesses and organizations

In politics

Salzburg Forum The Salzburg Forum (SF) is a Central European security partnership of Austria, Bulgaria, Croatia, the Czech Republic, Hungary, Poland, Romania, Slovakia and Slovenia. Member states cooperate in areas of police cooperation, illegal immigration, ...

, European security intergovernmental organization * Samoa First, a political party in Samoa *

Sinn Féin Sinn Féin ( ; ; ) is an Irish republican and democratic socialist political party active in both the Republic of Ireland and Northern Ireland. The History of Sinn Féin, original Sinn Féin organisation was founded in 1905 by Arthur Griffit ...

, an Irish political party *

Socialistisk Folkeparti The Green Left, since March 2022 the English name for Socialistisk Folkeparti (, , abbr. SF), is a democratic socialist political party in Denmark. SF was founded on 15 February 1959 by Aksel Larsen, a former leader of the Communist Party of ...

, a political party in Denmark *

Sosialistisk Folkeparti The Socialist People's Party () was a splinter group of the Norwegian Labour Party (DNA) founded in 1961. SF was principally dissatisfied with the pro-NATO/European Economic Community external policies of DNA. A group centered on the magazine had ...

, a splinter group of the Norwegian Labour Party

Other businesses and organizations

Statsforetak or SF, meaning State Enterprise is a type of company in Norway. SFs are wholly owned by the Government of Norway, but it does not hold unlimited liability in the company. The government is free to convert any (limited company) that it owns, or ...

, a type of Norwegian state enterprise *

SF Express SF Express (Group) Co., Ltd. is a Chinese multinational delivery services and logistics company based in Shenzhen, Guangdong. It is the largest courier in China, and provides domestic and international express delivery. SF Express operates a f ...

, a Chinese multinational delivery services and logistics company **

SF Airlines SF Airlines () is a Chinese cargo airline owned by SF Express (Group) Co. The company is headquartered in the No.1 Freight Depot of the International Shipping Center of Shenzhen Bao'an International Airport in Bao'an District, Shenzhen, Guan ...

, a Chinese cargo airline owned by SF Express *

Salesforce Salesforce, Inc. is an American cloud-based software company headquartered in San Francisco, California. It provides applications focused on sales, customer service, marketing automation, e-commerce, analytics, artificial intelligence, and ap ...

, an American cloud computing company specializing in customer resource management *

SourceForge SourceForge is a web service founded by Geoffrey B. Jeffery, Tim Perdue, and Drew Streib in November 1999. SourceForge provides a centralized software discovery platform, including an online platform for managing and hosting open-source soft ...

, a web-based service that offers a source code repository, download mirrors, bug tracking and other features *

Space forces A space force is a military branch of a nation's armed forces that conducts military operations in outer space and space warfare. The world's first space force was the Russian Space Forces, established in 1992 as an independent military servic ...

, military service branches for space operations *

Special forces Special forces or special operations forces (SOF) are military units trained to conduct special operations. NATO has defined special operations as "military activities conducted by specially designated, organized, selected, trained and equip ...

, military units trained to perform unconventional missions *

State Farm State Farm Insurance is a group of mutual insurance companies throughout the United States with corporate headquarters in Bloomington, Illinois. Founded in 1922, it is the largest property and casualty insurance, property, casualty and auto i ...

, an American insurance company *

Tassili Airlines Tassili Airlines () is an Algerian passenger airline, based in Algiers, owned by Sonatrach, the national state-owned oil company of Algeria. Founded in 1998, Tassili now provides scheduled services out of Houari Boumedienne Airport, as well as ...

(IATA designator SF) *

Six Flags Six Flags Entertainment Corporation is an American amusement park company headquartered in Charlotte, North Carolina, United States. It was formed on July 2, 2024, following a merger between longtime rivals Cedar Fair and the former Six Flags ...

*A common shorthand for "Standard Form", a designation used by the

United States Office of Personnel Management The United States Office of Personnel Management (OPM) is an independent agency of the United States government that manages the United States federal civil service. The agency provides federal human resources policy, oversight, and support, an ...

for forms used across various government agencies

In science, math, and engineering

Significant figures Significant figures, also referred to as significant digits, are specific digits within a number that is written in positional notation that carry both reliability and necessity in conveying a particular quantity. When presenting the outcom ...

, numeric digits contributing meaningfully to measurement resolution *

Safety factor In engineering, a factor of safety (FoS) or safety factor (SF) expresses how much stronger a system is than it needs to be for its specified maximum load. Safety factors are often calculated using detailed analysis because comprehensive testing i ...

, the capacity of a system beyond expected or actual loads *

Spontaneous fission Spontaneous fission (SF) is a form of radioactive decay in which a heavy atomic nucleus splits into two or more lighter nuclei. In contrast to induced fission, there is no inciting particle to trigger the decay; it is a purely probabilistic proc ...

, a form of radioactive decay found in very heavy elements *

Square foot The square foot (; abbreviated sq ft, sf, or ft2; also denoted by '2 and ⏍) is an imperial unit and U.S. customary unit (non- SI, non-metric) of area, used mainly in the United States, Canada, the United Kingdom, Bangladesh, India, Nepal, Pa ...

, unit of area *

Stacking fault In crystallography, a stacking fault is a planar defect that can occur in crystalline materials.Fine, Morris E. (1921). "Introduction to Chemical and Structural Defects in Crystalline Solids", in ''Treatise on Solid State Chemistry Volume 1'', Sp ...

, a dislocation in a crystal *S.F., an acronym name for

stick figure Stick Figure is an American reggae and dub band founded in 2005. The group has released eight full-length albums and one instrumental album (Prince Fatty Presents), all of which were written and produced by frontman and self-taught multi-instr ...

In sports

* A common abbreviation for the U.S. city of

San Francisco, California San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...

's major professional sports teams: **

San Francisco 49ers The San Francisco 49ers (also written as the San Francisco Forty-Niners and nicknamed the Niners) are a professional American football team based in the San Francisco Bay Area. The 49ers compete in the National Football League (NFL) as a member ...

, the city's National Football League team **

San Francisco Giants The San Francisco Giants are an American professional baseball team based in San Francisco. The Giants compete in Major League Baseball (MLB) as a member club of the National League (baseball), National League (NL) National League West, West Div ...

, the city's Major League Baseball team *

Small forward The small forward (SF), also known as the three, is one of the five Basketball position, positions in a regulation basketball game. Small forwards are typically shorter, quicker, and leaner than Power forward (basketball), power forwards and Cent ...

, a position in basketball *

Stade Français Stade Français Paris (known commonly as Stade Français, ) is a French professional rugby union club based in the 16th arrondissement of Paris. The club plays in the Top 14 domestic league in France and is one of the most successful French ...

, a French rugby union team based in Paris *

Superleague Formula Superleague Formula was an Open wheel car, open wheel single seater Formula racing, motor racing formula, which started in 2008, at Donington Park in the United Kingdom. The league introduced team sponsorship by association football clubs. It u ...

, a former motorsport racing series *

Super Formula Championship The Japanese Super Formula Championship is a formula racing series held primarily in Japan. It is considered to be the pinnacle of single-seater racing in Japan or Asia as a whole, making it one of the top motorsport series in the region. The ...

, a Japanese motorsport racing series *

Sacrifice fly In baseball, a sacrifice fly (sometimes abbreviated to sac fly) is defined by Rule 9.08(d): "Score a sacrifice fly when, before two are out, the batter hits a ball in flight handled by an outfielder or an infielder running in the outfield in fair o ...

, a play in baseball *

Semi-finals A single-elimination knockout, or sudden-death tournament is a type of elimination tournament where the loser of a match-up is immediately eliminated from the tournament. Each winner will play another in the next round, until the final match-up, ...

, a round in elimination tournaments *

Scuderia Ferrari Scuderia Ferrari (; ), currently racing under Scuderia Ferrari HP, is the racing division of luxury Italian auto manufacturer Ferrari and the racing team that competes in Formula One racing. The team is also known by the nickname "the Pranc ...

, an Italian Formula One team

Other uses

San Francisco (sans-serif typeface) San Francisco, officially the City and County of San Francisco, is a commercial, financial, and cultural center of Northern California. With a population of 827,526 residents as of 2024, San Francisco is the fourth-most populous city in the ...

, Apple's sans-serif and corporate typeface *

United States Air Force Security Forces The United States Air Force Security Forces (SF) are the ground combat force and military police service of the U.S. Air Force and U.S. Space Force. The USAF Security Forces were formerly known as Military Police (MP), Air Police (AP), and ...

, the ground combat, force protection and military police force of the U.S. Air Force *

United States Army Special Forces The United States Army Special Forces (SF), colloquially known as the "Green Berets" due to their distinctive service Berets of the United States Army, headgear, is a branch of the United States Army United States Army Special Operations Comm ...

, special operations organization of the U.S. Army *

Selle Français The Selle Français (SF) is a horse breed, breed of sport horse from France. An athletic horse with good horse gaits, gaits, it is usually bay (horse), bay or chestnut (coat), chestnut in color. The Selle Français was created in 1958 when se ...

, a French breed of horse *A former

hull classification symbol The United States Navy, United States Coast Guard, and United States National Oceanic and Atmospheric Administration (NOAA) use a hull classification symbol (sometimes called hull code or hull number) to identify their ships by type and by ind ...

for a fleet submarine in the United States Navy *

Franklin Avenue Shuttle The Franklin Avenue Shuttle is a New York City Subway shuttle service operating in Brooklyn. The shuttle service uses the BMT Franklin Avenue Line exclusively and operates 24 hours a day. The north terminus is Franklin Avenue, with a transfe ...

in New York City, sometimes signed as S^F in documents