FS, fS or fs may refer to:
Arts and entertainment FS (musician) (real name Fred Sargolini), American dubstep producer and DJ from New York Florin Salam, Romanian manele musician often called by his initials FS 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 sports programming division of Fox Corporation Fox Sports 1 (FS1) Fox Sports 2 (FS2)
Books Halo: First Strike, a novel written by Eric Nylund for the Halo series, published in 2003
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 Federal Signal, a warning systems manufacturer
Transportation Ferrocarril de Sóller, a railway on Majorca Ferrovie dello Stato Italiane, 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, 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 (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 ), 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) 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
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) FontStruct, a font-making website Nikkormat FS, a Nikon film SLR camera