# SF

SF may refer to:

## Locations

* San Francisco, California, United States
* Sidi Fredj, Algeria
* South Florida, an urban region in the United States
* Suomi Finland, former vehicular country code for Finland

## In arts and entertainment
### Genres

* Speculative fiction (usually sf)
** Science fiction or sci-fi (usually SF)

### In film and television

* Svensk Filmindustri, the Swedish film industry
** SF Film Finland, a Finnish film distributor
* SF Channel (Australia)
* Schweizer Fernsehen, a German-language television network in Switzerland
* Suomen Filmiteollisuus, a Finnish film production company

### In music

* Sforzando (musical direction) or sf, a musical accent
* Subito forte, a musical notation for dynamics (music)
* Switchfoot, 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, a series of fighting video games by Capcom

## Businesses and organizations
### In politics

* Salzburg Forum, European security intergovernmental organization
* Samoa First, a political party in Samoa
* Sinn Féin, an Irish political party
* Socialistisk Folkeparti, a political party in Denmark
* Sosialistisk Folkeparti, a splinter group of the Norwegian Labour Party

### Other businesses and organizations

* Statsforetak, a type of Norwegian state enterprise
* SF Express, a Chinese multinational delivery services and logistics company
** SF Airlines, a Chinese cargo airline owned by SF Express
* Salesforce, an American cloud computing company specializing in customer resource management
* SourceForge, a web-based service that offers a source code repository, download mirrors, bug tracking and other features
* Space forces, military service branches for space operations
* Special forces, military units trained to perform unconventional missions
* State Farm, an American insurance company
* Tassili Airlines (IATA designator SF)
* Six Flags
* A common shorthand for "Standard Form", a designation used by the United States Office of Personnel Management for forms used across various government agencies

## In science, math, and engineering

* Significant figures, numeric digits contributing meaningfully to measurement resolution
* Safety factor, the capacity of a system beyond expected or actual loads
* Spontaneous fission, a form of radioactive decay found in very heavy elements
* Square foot, unit of area
* Stacking fault, a dislocation in a crystal
* S.F., an acronym name for stick figures

## In sports

* A common abbreviation for the U.S. city of San Francisco, California's major professional sports teams:
** San Francisco 49ers, the city's National Football League team
** San Francisco Giants, the city's Major League Baseball team
* Small forward, a position in basketball
* Stade Français, a French rugby union team based in Paris
* Superleague Formula, a former motorsport racing series
* Super Formula Championship, a Japanese motorsport racing series
* Sacrifice fly, a play in baseball
* Semi-finals, a round in elimination tournaments
* Scuderia Ferrari, an Italian Formula One team

## Other uses

* San Francisco (sans-serif typeface), Apple's sans-serif and corporate typeface
* United States Air Force Security Forces, the ground combat, force protection and military police force of the U.S. Air Force
* United States Army Special Forces, special operations organization of the U.S. Army
* Selle Français, a French breed of horse
* A former hull classification symbol for a fleet submarine in the United States Navy