| Acronym | Definition |
|---|
| FS | For Sale |
| FS | Flight Simulator |
| FS | Forest Service |
| FS | File System |
| FS | For Sure |
| FS | Free Safety (football) |
| FS | Free Stuff |
| FS | Free Space (computer disk) |
| FS | Financial Services |
| FS | Full Suspension (mountain bikes) |
| FS | Full Scale |
| FS | Future Shop |
| FS | Full Screen |
| FS | Full Service |
| FS | Full-Size |
| FS | Fachschaft |
| FS | Fighter Squadron |
| FS | Full Speed |
| FS | Fouls Suffered (soccer) |
| FS | File Sharing |
| FS | Figure Skating |
| FS | file server |
| FS | Food Stamps |
| FS | Fun Stuff |
| FS | Freestyle (Swimming) |
| FS | Facilities Services |
| FS | Financial Statement |
| FS | Feasibility Study |
| FS | Fire Station |
| FS | Fire Suppression |
| FS | Fluttershy (fictional character) |
| FS | Frame Size (cattle) |
| FS | Fail Safe |
| FS | First Stage |
| FS | Florida Sportsman (magazine) |
| FS | Frame-Sync |
| FS | Ferrovie dello Stato |
| FS | Field Service |
| FS | Folk Song |
| FS | Firing Squad (gaming clan) |
| FS | FreeSpace (game) |
| FS | Final Score |
| FS | Financial Solutions (various locations) |
| FS | Fast Start (software) |
| FS | Functional Specification |
| FS | Front Side (skating term) |
| FS | Fee Simple |
| FS | Federal Standard |
| FS | Frank Sinatra |
| FS | Final Settlement |
| FS | Flax Seed |
| FS | Family Studies (various schools) |
| FS | First Strike |
| FS | False Start (racing) |
| FS | Fire Support |
| FS | Fire Science |
| FS | Front Seat |
| FS | Friendster |
| FS | Five Stars |
| FS | Frontside (extreme sports) |
| FS | File Structure |
| FS | Fundamentals of Surveying |
| FS | Flow Switch |
| FS | Function String |
| FS | Field Station |
| FS | Faculty Senate (various locations) |
| FS | Flight Safety |
| FS | Fisher Scientific |
| FS | Fender Stratocaster (guitar) |
| FS | Finger Style (musical instruments) |
| FS | Feature Story |
| FS | Field Strength (of radio signal) |
| FS | Far Side |
| FS | Flight System |
| FS | Safety factor |
| FS | Free Surface (hydrodynamics) |
| FS | Fuel Surcharge (shipping) |
| FS | Farscape (Sci-Fi TV show) |
| FS | Full Search (algorithm) |
| FS | First Service |
| FS | Fine Sand |
| FS | French Ship (NATO designation) |
| FS | Four Swords (gaming, The Legend of Zelda) |
| FS | Frequency Shift |
| FS | Febrile Seizure (neurology) |
| FS | Finite State |
| FS | Field Separator |
| FS | Financial Secretary |
| FS | Factor of Safety |
| FS | First Sergeant |
| FS | Federal-Signal (warning light manufacturer) |
| FS | File Separator |
| FS | Fractional Shortening |
| FS | Formation Skydiving |
| FS | Formal Specification |
| FS | Fine Silver |
| FS | Florida Statute |
| FS | Future State |
| FS | Fantasy Strike (gaming) |
| FS | Float Switch |
| FS | Feudal System |
| FS | Fluoroscopy |
| FS | Franz Schubert (classical composer) |
| FS | Fat Slob |
| FS | Flight Surgeon |
| FS | Force Structure |
| FS | Flock of Seagulls (band) |
| FS | Frame Synchronization (computing) |
| FS | Flight Speed |
| FS | Forged Steel |
| FS | Finish to Start |
| FS | Frame Status |
| FS | Field Stop |
| FS | Fire Star (CyberGuard firewall model) |
| FS | Full Sail (college, Florida) |
| FS | Funky Stuff |
| FS | Final Status |
| FS | Fine Steel (Everquest gaming reference) |
| FS | Flight Sergeant (non-commissioned officer in HM Royal Air Force) |
| FS | Filing Season |
| FS | Fixed Service |
| FS | Force Support |
| FS | Federal Specification |
| FS | Feature Service |
| FS | Fixed Satellite |
| FS | Fireman Sam (children's character) |
| FS | Frozen Section (diagnostics) |
| FS | Flexible Sigmoidoscopy (medical procedure) |
| FS | Fair Scheduler (computing) |
| FS | Final Submission |
| FS | Final Speed |
| FS | Fixed Station |
| FS | Farm Sanctuary |
| FS | Forward Support |
| FS | Foreign Subsidiary |
| FS | Flight Spare |
| FS | Frozen Soil |
| FS | Food Service Specialist |
| FS | Fund Source |
| FS | Femto-Second |
| FS | Fingerstick (blood glucose level) |
| FS | Firebird Suite (Stravinsky) |
| FS | Flipmode Squad (gaming clan) |
| FS | Finish Surface |
| FS | First Shirt |
| FS | Freakin' Sweet |
| FS | Fleischner Society |
| FS | French Southern & Antarctic Lands |
| FS | Financial Stewardship |
| FS | Fraud Squad (police) |
| FS | Force-Sensitive (Star Wars Galaxies - MMORPG) |
| FS | Full Shot |
| FS | Fundación Sobrevivientes (Spanish: Survivors Foundation; Guatemala) |
| FS | Fore Sight (surveying) |
| FS | Federation Starship (Star Wars) |
| FS | Force Standards |
| FS | Full Synchronization |
| FS | Financials System (ERP systems) |
| FS | Fuselage Station |
| FS | Functional Service |
| FS | Freaky Styley (Red Hot Chili Peppers album) |
| FS | Flame Strike (gaming) |
| FS | Flare Single-Unit (US DoD) |
| FS | Fighter Sector |
| FS | Search Radius Safety Factor (US DoD) |
| FS | FastServers.Net (web hosting provider; Chicago, IL) |
| FS | Field Specimen |
| FS | Finite Scheduling (operations management) |
| FS | Frost Shock (gaming, World of Warcraft Shaman Spell) |
| FS | Fractostratus (cloud formation) |
| FS | Felix Schlag (designer of the Jefferson nickel; initials on obverse) |
| FS | Friendly Status |
| FS | Sulphur Trioxide in Chlorosulfonic Acid |
| FS | Flagship Suite (American Airlines) |
| FS | Faithful Spouse |
| FS | Fleet Surgeon |
| FS | Farmland Security |
| FS | Fixed Scenario |
| FS | Frame Station |
| FS | Fan, Supply |
| FS | Furnace Soldering |
| FS | FraggleScript |
| FS | False Smut |
| FS | Forward Shell |
| FS | Follow Ship |
| FS | Fireman's Switch |
| FS | Force Stabilization |
| FS | Flexible Sustainment |
| FS | Forces of Solidarity (Star Wars gaming clan) |
| FS | Signal Framing Bits |
| FS | Functional Sponsor |
| FS | Focus Subassembly |
| FS | Fallsaver (fall prevention device) |
| FS | Fivaz/Stanton Guide (numismatic publication) |
| FS | Fonds of Solidarite |