SF may refer to:

Locations

San Francisco San Francisco (; Spanish language, Spanish for "Francis of Assisi, Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the List of Ca ...

, California, 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 municipality of Staouéli, on a presque-isle on the Mediterranean Sea. It is the site of the ancie ...

, Algeria *

South Florida South Florida is the southernmost region of the U.S. state of Florida. It is one of Florida's three most commonly referred to directional regions; the other two are Central Florida and North Florida. South Florida is the southernmost part of th ...

, 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 a term that has been used with a variety of (sometimes contradictory) meanings. The broadest interpretation is as a category of fiction encompassing genres with elements that do not exist in reality, recorded history, na ...

(usually ''sf'') **

Science fiction Science fiction (sometimes shortened to Sci-Fi or SF) is a genre of speculative fiction which typically deals with imaginative and futuristic concepts such as advanced science and technology, space exploration, time travel, parallel unive ...

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

In film and television

* , 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 of ...

, a Finnish film distributor *

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

* , a German-language television network in Switzerland * , a Finnish film production company

In music

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

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

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

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

, 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, a Japanese role-playing game system * ''

Street Fighter , commonly abbreviated as ''SF'' or スト (''Suto''), is a Japanese media franchise centered on a series of fighting video and arcade games developed and published by Capcom. The first game in the series was released in 1987, followed by six ...

'', 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 *

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

, an Irish political party * , a political party in Denmark * , a splinter group of the Norwegian Labour Party

Other businesses and organizations

* , 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 second largest courier in China, and provides domestic and international express delivery. SF Express has a ...

, 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, Guangdong ...

, 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 customer relationship management (CRM) software and applications focused on sales, customer service, marketing automation, a ...

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

SourceForge SourceForge is a web service that offers software consumers a centralized online location to control and manage open-source software projects and research business software. It provides source code repository hosting, bug tracking, mirrorin ...

, 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 service. ...

, military service branches for space operations *

Special forces Special forces and 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 large group of mutual insurance companies throughout the United States with corporate headquarters in Bloomington, Illinois. Overview State Farm is the largest property and casualty insurance provider, and the la ...

, an American insurance company *

Tassili Airlines Tassili Airlines ( ar, طيران الطاسيلي) 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 B ...

(IATA designator SF) *

Six Flags Six Flags Entertainment Corporation is an American amusement park corporation, headquartered in Arlington, Texas. It has properties in Canada, Mexico, and the United States. Six Flags owns the most theme parks and waterparks combined of any amu ...

* 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 Federal Government that manages the US civilian service. The agency provides federal human resources policy, oversight and support, and tends t ...

for forms used across various government agencies

In science, math, and engineering

Significant figures Significant figures (also known as the significant digits, ''precision'' or ''resolution'') of a number in positional notation are digits in the number that are reliable and necessary to indicate the quantity of something. If a number expre ...

, numeric digits contributing meaningfully to measurement resolution *

Safety factor In engineering, a factor of safety (FoS), also known as (and used interchangeably with) safety factor (SF), expresses how much stronger a system is than it needs to be for an intended load. Safety factors are often calculated using detailed analy ...

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

Spontaneous fission Spontaneous fission (SF) is a form of radioactive decay that is found only in very heavy chemical elements. The nuclear binding energy of the elements reaches its maximum at an atomic mass number of about 56 (e.g., iron-56); spontaneous breakdo ...

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

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

, 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'', Spr ...

, a dislocation in a crystal

In sports

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

San Francisco, California San Francisco (; Spanish for " Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the fourth most populous in California and 17th ...

's major professional sports teams: **

San Francisco 49ers The San Francisco 49ers (also written as the San Francisco Forty-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 of the league's National ...

, the city's National Football League team **

San Francisco Giants The San Francisco Giants are an American professional baseball team based in San Francisco, California. The Giants compete in Major League Baseball (MLB) as a member club of the National League (NL) West division. Founded in 1883 as the New Yor ...

, the city's Major League Baseball team *

Small forward The small forward (SF), also known as the three or swingman, is one of the five positions in a regulation basketball game. Small forwards are typically shorter, quicker, and leaner than power forwards and centers but taller, larger, and stronger t ...

, a position in basketball *

Stade Français Stade Français Paris Rugby () 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 clubs of the modern era. The ...

, a French rugby union team based in Paris * Superleague Formula, a former motorsport racing series *

Super Formula Championship The Japanese Super Formula Championship is a formula racing series. It is considered as being the top level of single-seater racing in Japan and regional motorsports in Asia. The series is sanctioned by the Japan Automobile Federation (JAF) and ...

, 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 each match-up is immediately eliminated from the tournament. Each winner will play another in the next round, until the final matc ...

, a round in elimination tournaments *

Scuderia Ferrari Scuderia Ferrari Società per Azioni, S.p.A. () 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 Prancing Horse", in refere ...

, an Italian Formula One team

Other uses

San Francisco (sans-serif typeface) San Francisco is a neo-grotesque typeface made by Apple Inc. It was first released to developers on November 18, 2014. It is the first new typeface designed at Apple in nearly twenty years and has been inspired by Helvetica and DIN. The macOS ...

, 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. USAF Security Forces (SF) were formerly known as Military Police (MP), Air Police (AP), and Sec ...

, 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, are a special operations special operations force, force of the United States Ar ...

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