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

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

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