FSF

FSF may refer to:

Organizations

 * Free Software Foundation, an American non-profit organization with a mission to promote computer user freedom
 * Federal Security Force (Pakistan)
 * Federación de Sindicatos Ferroviarios, a defunct Argentine trade union
 * Financial Stability Forum, a defunct international organization of financial regulators
 * Flight Safety Foundation, an international independent, non-profit organization for research, education, and communications in the field of civil aviation flight safety
 * Föreningen Sveriges Filmfotografer, the Swedish Society of Cinematographers
 * Progressive Party, an Icelandic political party (in Icelandic: Framsóknarflokkurinn)

Arts and entertainment

 * Folsom Street Fair, a street fair in San Francisco, California, United States
 * Further Seems Forever, a rock band
 * Fugitive Strike Force, a 2006 television series
 * The Magazine of Fantasy & Science Fiction, also abbreviated F&SF
 * Speculative fiction (genre) containing the subgenre of fantasy/science fiction (F/SF)
 * Science fantasy (genre), a mixed genre of fantasy and science fiction elements
 * Festival of Slovenian Film, an annual film festival in Portorož, Slovenia

Sports

 * Faroe Islands Football Association (Faroese: Fótbóltssamband Føroya)
 * Federação Sergipana de Futebol, the Football Federation of Sergipe, Brazil
 * Football Supporters' Federation
 * Fuerte San Francisco, a Salvadoran football club
 * Sahrawi Football Federation (Spanish: Federación Saharaui de Fútbol)
 * São Toméan Football Federation (Portuguese: Federação Santomense de Futebol)
 * Senegalese Footrrball Federation (French: Fédération Sénégalaise de Football)

Other uses

 * Familial Shar Pei fever
 * Fibrin-stabilizing factor
 * Flexible Support Fund in the United Kingdom
 * Fourth suit forcing, a bidding convention in the game of contract bridge
 * Free speech fights, a series of 20th-century labor-related conflicts in the United States
 * Full state feedback