Formula Student, a student engineering competition held annually in the UKFile Separator, a character in the C0 and C1 control codesFile server, a form of disk storageFile system, in computer science and database theoryFull scale or FS, the maximum measurable valueFullscreen, the picture format as opposed to widescreenFrugooSoft, a community & interaction siteFS register in X86fs computer architectureFuture System a failed IBM project to develop a computer line to replace System/360Fallen sword, an MMORPG
Science and technology
Fujita scale (F-Scale), or Fujita-Pearson scale, is a scale for rating tornado intensityFull scale, the maximum amplitude a system can presentFlank speed, a ship's true maximum speed
Transportation
Ferrocarril de Sóller, a railway on MajorcaFerrovie dello Stato, the Italian railwaysItAli Airlines, IATA airline designator
Health and medicine
Fibrin sealant, type of surgical tissue adhesive used during surgery to control bleedingFlight Surgeon, physicians who are primarily responsible for the medical evaluation, certification and treatment of aviation personnelFractional shortening of the heart
Military
Fin-stabilized projectiles, such as APFSDS or HEAT-FS (ammunition for tank guns)Fire Support, a military termFlight Sergeant, a non-commissioned officer in some air forcesFlight Simulator, a simulator that tries to replicate the experience of flying for military personnelFlight Surgeon, physicians who are primarily responsible for the medical evaluation, certification and treatment of aviation personnelFrench Ship, a NATO prefix for ships of the French Navy
Mathematics
Fourier series, a mathematical tool used for analyzing periodic functions, symbol for the Sampling rate
Sports
Fox Sports (United States)Free Safety, one variation of the defensive back position in American footballFree skating, the second part of a figure skating competition
Other
FS (musician), a musicianFrench Southern Territories: FIPS PUB 10-4 territory code (excluding the Terre Adélie portion of Antarctica)Full Sail Real World Education, a university in Florida dedicated to real world education in the entertainment industry* Fine StructureFuture Shop, Canada's largest online and brick and mortar consumer electronics retailerFranco's Spain, Francisco Franco's leadership of SpainFor Sale (disambiguation), various meaningsFederal Standard 595, a United States Federal standard used to define color shadesFrankfurt School, a neo-Marxist school of social theoryFlipnote Studio, a DSi software to make animtionsFull Service, conventional sexual intercourseFinancial Secretary (Hong Kong)Femtosecond, an SI unit of timeFrameshift mutation, a genetic mutationFemtosiemens, a measure of siemens (unit) an SI unit of electric conductanceFS, symphonic musical compositions assigned by Dan Fog and Torben Schousboe to the works of Carl NielsenFS, an American post-rock band from Greenville, NC
