FS, fS or fs may refer to:

Arts and entertainment

* FS (musician) (real name Fred Sargolini), American dubstep producer and DJ from New York * FS Catalogue, a numbered list of all compositions by Carl Nielsen * FS Film, a Finnish film distributor * Flight simulator, a professional simulator of planes ** Flight simulation video game, a video game version of simulators *** '' Microsoft Flight Simulator'', an amateur flight simulator series **** '' Microsoft Flight Simulator X'' (''FSX''), the 2006 edition **** ''Microsoft Flight Simulator'' (2020 video game) (''FS''), the 2020 edition *

Fox Sports (United States) The Fox Sports Media Group is the American sports programming division of Fox Corporation that is responsible for sports broadcasts carried by the Fox Broadcasting Company, as well as operating television networks Fox Sports 1 (FS1) and Fox Sp ...

, the sports programming division of Fox Corporation ** Fox Sports 1 (FS1) ** Fox Sports 2 (FS2)

Businesses and organizations

* Fagoppositionens Sammenslutning, a Danish trade union federation * FamilySearch, a genealogical organization and website * Farmers' and Settlers' Association of New South Wales (F & S), Australia * Fortune Systems, a defunct American computer manufacturer * Frankfurt School of Finance & Management, a business school in Frankfurt, Germany * FS Services, an agricultural supply cooperative, now Growmark * Full Sail University, a university in Florida, US * Future Shop, a defunct Canadian consumer electronics retailer

Transportation

* Ferrocarril de Sóller, a railway on Majorca * Ferrovie dello Stato, Italian state railways ** Trenitalia, its subsidiary for operating passenger rail transport * First ScotRail, a British rail train operator * ItAli Airlines (former IATA code: FS), a former Italian airline (2003-2011) * Flyr (airline) (former IATA code: FS), a former Norwegian airline (2020-2023)

Science and technology

Feldspar Feldspar ( ; sometimes spelled felspar) is a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the ''plagiocl ...

, a group of silicate minerals * Fin-stabilized projectile, such as the APFSDS or HEAT-FS * Flank speed, a ship's true maximum speed * Frameshift mutation, a genetic mutation *

Fujita scale The Fujita scale (F-Scale; ), or Fujita–Pearson scale (FPP scale), is a scale for rating tornado intensity, based primarily on the damage tornadoes inflict on human-built structures and vegetation. The official Fujita scale category is determ ...

(F-Scale), or Fujita-Pearson scale, a scale for rating tornado intensity * Full scale, in electronics and signal processing, the maximum amplitude a system can present * Marine flooding surface, a sharp contact between deep-water and shallow-water facies in sequence stratigraphy * Sampling rate (symbol

f_s

), in communications theory * Fourier series, a mathematical tool used for analyzing periodic functions

Computing

* FS register, in X86fs computer architecture * File Separator, a character in the C0 and C1 control codes * File server, a form of disk storage * File system, in computer science and database theory * Flipnote Studio, a DSi animation software * Forward secrecy, a property of cryptographic systems * Fullscreen, a picture format in 4:3 aspect ratio, as opposed to widescreen * IBM Future Systems project a failed IBM project to develop a computer line to replace System/360 * Feature structure, a set of attribute–value pairs

Medicine

* Felty's syndrome, autoimmune disease, with rheumatoid arthritis, enlargement of the spleen and too few neutrophils in the blood * Fibrin sealant, a type of surgical tissue adhesive used during surgery to control bleeding * Flight Surgeon, a physician who is responsible for the medical evaluation, certification and treatment of aviation personnel * Fractional shortening, of the heart * '' Formularium Slovenicum'', Slovenian addendum to the European Pharmacopoeia

Physics

* Femtosecond (fs), an SI unit of time *

Siemens (unit) The siemens (symbol: S) is the unit of electric conductance, electric susceptance, and electric admittance in the International System of Units (SI). Conductance, susceptance, and admittance are the reciprocals of resistance, reactance, an ...

Femtosiemens, an SI unit of electric conductance * Fine structure, in atomic physics

Military

* Freight and supply ship (FS), a US Army classification for a type of cargo ship * Fire support, artillery or close air support for combat operations * Flight Sergeant, a non-commissioned officer in some air forces * Flight Surgeon, physician primarily responsible for the medical evaluation, certification and treatment of aviation personnel * French Ship (FS), a NATO prefix for ships of the

French Navy The French Navy (, , ), informally (, ), is the Navy, maritime arm of the French Armed Forces and one of the four military service branches of History of France, France. It is among the largest and most powerful List of navies, naval forces i ...

Sport

* Free safety, one variation of the defensive back position in American football * Free skating, the second part of a figure skating competition * Formula Student, a student engineering competition held annually in the UK

Other uses

* Federal Standard 595, a United States federal standard defining color shades * Financial Secretary (Hong Kong) * For Sale (disambiguation) * Foundation Stage, term used for early childhood education in the UK * Franco's Spain, Spain under the leadership of Francisco Franco * French Southern Territories (FIPS PUB 10-4 territory code); excludes the Terre Adélie portion of Antarctica * Full service (disambiguation) {{disambiguation