• San Francisco, California, United States
• Science fiction
  Science fiction
  Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...
  
  

Sports

• Small forward
  Small forward
  The small forward, or colloquially known as three, is one of the five positions in a regulation basketball game. Small forwards are typically somewhat shorter, quicker, and leaner than power forwards and centers, but on occasion are just as tall...
  
  , a position in basketball
• Stade Français, a French rugby union team based in Paris
• Superleague Formula
  Superleague Formula
  Superleague Formula is an open wheel single seater motor racing formula, which started in 2008, at Donington Park in the United Kingdom. The league introduced team sponsorship by association football clubs. It goes by the saying 'The Beautiful Race: Football at 300 km/h'. By 2011 the link with...
  
  , a motorsport racing series

Political parties

• Sinn Féin
  Sinn Féin
  Sinn Féin is a left wing, Irish republican political party in Ireland. The name is Irish for "ourselves" or "we ourselves", although it is frequently mistranslated as "ourselves alone". Originating in the Sinn Féin organisation founded in 1905 by Arthur Griffith, it took its current form in 1970...
  
  , an Irish political party or Socialist People's Party, a political party in Denmark or Socialist People's Party, a splinter group of the Norwegian Labour Party

Other uses

• Safety factor, a German-language television network in Switzerland
• United States Air Force Security Forces, a French breed of horse
• Significant figures
  Significant figures
  The significant figures of a number are those digits that carry meaning contributing to its precision. This includes all digits except:...
  
  
• Speculative fiction
  Speculative fiction
  Speculative fiction is an umbrella term encompassing the more fantastical fiction genres, specifically science fiction, fantasy, horror, supernatural fiction, superhero fiction, utopian and dystopian fiction, apocalyptic and post-apocalyptic fiction, and alternate history in literature as well as...
  
  
• Spontaneous fission
  Spontaneous fission
  Spontaneous fission is a form of radioactive decay characteristic of very heavy isotopes. Because the nuclear binding energy reaches a maximum at a nuclear mass greater than about 60 atomic mass units , spontaneous breakdown into smaller nuclei and single particles becomes possible at heavier masses...
  
  , a nuclear decay route in which a superheavy nucleus splits into two, a type of Norwegian state enterprise
• Street Fighter
  Street Fighter
  , commonly abbreviated as SF, is a series of Fighting Games developed in Japan in which the players pit the video games' competitive fighters from around the world, each with his or her own unique fighting style, against one another...
  
  , a series of fighting games by Capcom, a Finnish film production company, the Swedish film industry
• Switchfoot
  Switchfoot
  Switchfoot is an American rock band from San Diego, California. The band's members are Jon Foreman , Tim Foreman , Chad Butler , Jerome Fontamillas , and Drew Shirley .After early successes in the Christian rock scene, Switchfoot first gained mainstream...
  
  , a band
• Tassili Airlines
  Tassili Airlines
  Tassili Airlines is a passenger airline based in Algiers, Algeria. It provides scheduled domestic services out of Houari Boumedienne Airport, as well as charter flights on behalf of the Algerian oil industry.-History:...
  
  ' IATA airline designator
• Subito forte, a musical notation for dynamics
  Dynamics (music)
  In music, dynamics normally refers to the volume of a sound or note, but can also refer to every aspect of the execution of a given piece, either stylistic or functional . The term is also applied to the written or printed musical notation used to indicate dynamics...
  
  
• SF, a former Hull classification symbol
  Hull classification symbol
  The United States Navy, United States Coast Guard, and United States National Oceanic and Atmospheric Administration use hull classification symbols to identify their ship types and each individual ship within each type...
  
   for a Fleet Submarine in the United States Navy

See also

• Garland SF-01
  Garland SF-01
  The Garland SF-01 and the Garland SF-02 are fictional race cars driven by Sugo Grand Prix driver Henri Claytor in the anime series Future GPX Cyber Formula.-2018:...
  
  , a fictional racing car in Future GPX Cyber Formula
• Garland SF-03
  Garland SF-03
  The Garland SF-03 is a fictional race car in the anime series Future GPX Cyber Formula.- History :Following the dismal failure of the Garland SF-02 in 2019, Claire Fortran further refined her design into the superb Garland SF-03. In a surprising move it saw former World Champion Hayato Kazami at...
  
  , a fictional racing car in Future GPX Cyber Formula