| F1 | Formula 1 |
| F1 | Function 1 |
| F1 | Filial 1 |
| F1 | Foundation year 1 |
| F1 | Formant 1 |
| F2FS | Flash-Friendly File System |
| F6S | from shortening the six letters between F and S to F6S |
| FAANG | Facebook, Amazon, Apple, Netflix and Google |
| Fab Lab | Fabrication Laboratory |
| Facebook | the name “Facebook” originated from the name of directories that were distributed to students at the beginning of the academic year to help students get to know each other |
| FACT | Federation Against Copyright Theft |
| FACT | Fertilisers And Chemicals Travancore |
| FACT | Cape Town International Airport |
| FACT | First Albany Companies Inc. |
| FACTS | Flexible Alternating Current Transmission System |
| FACTS | Florida Academic Counseling and Tracking for Students |
| FACTS | Families Acting for Community Traffic Safety |
| Family | noun: a group consisting of parents and their children living together as a unit |
| FAO | Food and Agriculture Organization |
| FAOSTAT | Food and Agriculture Organization Corporate Statistical Database |
| FAQ | Frequently Asked Questions |
| FAQ | Foire Aux Questions |
| FAQ | Femmes Autochtones du Québec |
| FAR | Federal Acquisition Regulation |
| FAR | Floor Area Ratio |
| FAR | Fund for Armenian Relief |
| FAR | Federal Aviation Regulation |
| FAR | Hector International Airport |
| FASM | Flat Assembler |
| FASM | Fine Arts Society of Milton |
| FAT | File Allocation Table |
| FATCA | Foreign Account Tax Compliance Act |
| FATCA | Federación Argentina de Trabajadores Cerveceros y Afines |
| FAW | First Automobile Works |
| FAW | Fall ArmyWorm |
| FAW | Football Association of Wales |
| FAW | Fellowship of Australian Writers |
| FAW | Front Axle Weight |
| Fax | Facsimile |
| FAX | Fresno Area Express |
| Fazer | named after its founder, Karl Fazer |
| FB | Facebook |
| FB | Bulgaria Air |
| FBI | Federal Bureau of Investigation |
| FBR | Foundation for Blood Research |
| FBR | Federal Board of Revenue |
| FBR | Foundation for Biomedical Research |
| FBR | Foreign Body Removal |
| FBR | Fluidized Bed Reactor |
| FBr | Fluctuating Brightness |
| FBS | Football Bowl Subdivision |
| FBS | Fetal Bovine Serum |
| FBT | Fringe Benefit Tax |
| FBT | Fused Biconic Technology |
| FBT | Flyback Transformer |
| FBT | Floridians for Better Transportation |
| FCA | Fiat Chrysler Automobiles |
| FCA | Financial Conduct Authority |
| FCA | Free Carrier |
| FCA | Fellow Chartered Accountant |
| FCA | Fellowship of Christian Athletes |
| FCA | Farm Credit Administration |
| FCA | Glacier Park International Airport |
| FCA | Federal Court of Australia |
| FCA | Finnish Cannabis Association |
| FCA | Fixed Channel Allocation |
| FCA | Florida Coastal Airlines |
| FCA | Funeral Consumers Alliance |
| FCB | Football Club of Barcelona |
| FCB | File Control Block |
| FCB | Fecal Coliform Bacteria |
| FCC | Federal Communications Commission |
| FCE | Cambridge English: First |
| FCE | Fondo de Cultura Económica |
| FCE | Feed Conversion Efficiency |
| FCE | FC Edmonton |
| FCE | Fianarantsoa-Côte Est |
| FCE | Final Cut Express |
| FCE | Functional Capacity Evaluation |
| FCE | Feedback-Controlled Electromigration |
| FCE | Free Church of England |
| FCE | FC Eintracht |
| FCHV | Fuel Cell Hybrid Vehicle |
| FCHV | Female Community Health Voluntee |
| FCHV-adv | Cell Hybrid Vehicle-Advanced |
| FCI | Food Corporation of India |
| FCI | Framatome Connectors International |
| FCI | Federal Correctional Institution |
| FCI | Food Craft Institute |
| FCNR | Foreign Currency Non-Resident |
| FCP | Final Cut Pro |
| FCP | Fracture Closure Pressure |
| FCP | Fibre Channel Protocol |
| FCP | Fonds Commun de Placement |
| FCP | Federal Capital Partners |
| FCP | Full Court Press |
| FCP | Federal Contractors’ Program |
| FCP | Forward Consolidation Point |
| FCP | Family Coalition Party |
| FCP | Fairfax County Parkway |
| FD | Fixed Deposit |
| FD | Floppy Disk |
| FD | Faizabad Junction railway station |
| FD | Familial Dysautonomia |
| FD | File Descriptor |
| FD | Functional Dependency |
| FD | Thai AirAsia |
| FD | Flight Director |
| FD | Finance Director |
| fd | Ferredoxins |
| FDA | Food and Drug Administration |
| FDA | Food and Drug Administration |
| FDA | Food and Drug Administration |
| FDA | Fluorescein Diacetate |
| FDA | Functional Data Analysis |
| FDA | Faisalabad Development Authority |
| FDA | Fuji Dream Airlines |
| FDA | Fully Differential Amplifier |
| FDA | Florida Dental Association |
| FDA | Forensic Data Analysis |
| FDA | Fórum Democrático Angolano |
| FDC | First Day Cover |
| FDC | First Data Corporation |
| FDC | Floppy Disk Controller |
| FDC | Flanders District of Creativity |
| F1 | Formula 1 |
| F1 | Function 1 |
| F1 | Filial 1 |
| F1 | Foundation year 1 |
| F1 | Formant 1 |
| F2FS | Flash-Friendly File System |
| F6S | from shortening the six letters between F and S to F6S |
| FAANG | Facebook, Amazon, Apple, Netflix and Google |
| Fab Lab | Fabrication Laboratory |
| Facebook | the name “Facebook” originated from the name of directories that were distributed to students at the beginning of the academic year to help students get to know each other |
| FACT | Federation Against Copyright Theft |
| FACT | Fertilisers And Chemicals Travancore |
| FACT | Cape Town International Airport |
| FACT | First Albany Companies Inc. |
| FACTS | Flexible Alternating Current Transmission System |
| FACTS | Florida Academic Counseling and Tracking for Students |
| FACTS | Families Acting for Community Traffic Safety |
| Family | noun: a group consisting of parents and their children living together as a unit |
| FAO | Food and Agriculture Organization |
| FAOSTAT | Food and Agriculture Organization Corporate Statistical Database |
| FAQ | Frequently Asked Questions |
| FAQ | Foire Aux Questions |
| FAQ | Femmes Autochtones du Québec |
| FAR | Federal Acquisition Regulation |
| FAR | Floor Area Ratio |
| FAR | Fund for Armenian Relief |
| FAR | Federal Aviation Regulation |
| FAR | Hector International Airport |
| FASM | Flat Assembler |
| FASM | Fine Arts Society of Milton |
| FAT | File Allocation Table |
| FATCA | Foreign Account Tax Compliance Act |
| FATCA | Federación Argentina de Trabajadores Cerveceros y Afines |
| FAW | First Automobile Works |
| FAW | Fall ArmyWorm |
| FAW | Football Association of Wales |
| FAW | Fellowship of Australian Writers |
| FAW | Front Axle Weight |
| Fax | Facsimile |
| FAX | Fresno Area Express |
| Fazer | named after its founder, Karl Fazer |
| FB | Facebook |
| FB | Bulgaria Air |
| FBI | Federal Bureau of Investigation |
| FBR | Foundation for Blood Research |
| FBR | Federal Board of Revenue |
| FBR | Foundation for Biomedical Research |
| FBR | Foreign Body Removal |
| FBR | Fluidized Bed Reactor |
| FBr | Fluctuating Brightness |
| FBS | Football Bowl Subdivision |
| FBS | Fetal Bovine Serum |
| FBT | Fringe Benefit Tax |
| FBT | Fused Biconic Technology |
| FBT | Flyback Transformer |
| FBT | Floridians for Better Transportation |
| FCA | Fiat Chrysler Automobiles |
| FCA | Financial Conduct Authority |
| FCA | Free Carrier |
| FCA | Fellow Chartered Accountant |
| FCA | Fellowship of Christian Athletes |
| FCA | Farm Credit Administration |
| FCA | Glacier Park International Airport |
| FCA | Federal Court of Australia |
| FCA | Finnish Cannabis Association |
| FCA | Fixed Channel Allocation |
| FCA | Florida Coastal Airlines |
| FCA | Funeral Consumers Alliance |
| FCB | Football Club of Barcelona |
| FCB | File Control Block |
| FCB | Fecal Coliform Bacteria |
| FCC | Federal Communications Commission |
| FCE | Cambridge English: First |
| FCE | Fondo de Cultura Económica |
| FCE | Feed Conversion Efficiency |
| FCE | FC Edmonton |
| FCE | Fianarantsoa-Côte Est |
| FCE | Final Cut Express |
| FCE | Functional Capacity Evaluation |
| FCE | Feedback-Controlled Electromigration |
| FCE | Free Church of England |
| FCE | FC Eintracht |
| FCHV | Fuel Cell Hybrid Vehicle |
| FCHV | Female Community Health Voluntee |
| FCHV-adv | Cell Hybrid Vehicle-Advanced |
| FCI | Food Corporation of India |
| FCI | Framatome Connectors International |
| FCI | Federal Correctional Institution |
| FCI | Food Craft Institute |
| FCNR | Foreign Currency Non-Resident |
| FCP | Final Cut Pro |
| FCP | Fracture Closure Pressure |
| FCP | Fibre Channel Protocol |
| FCP | Fonds Commun de Placement |
| FCP | Federal Capital Partners |
| FCP | Full Court Press |
| FCP | Federal Contractors’ Program |
| FCP | Forward Consolidation Point |
| FCP | Family Coalition Party |
| FCP | Fairfax County Parkway |
| FD | Fixed Deposit |
| FD | Floppy Disk |
| FD | Faizabad Junction railway station |
| FD | Familial Dysautonomia |
| FD | File Descriptor |
| FD | Functional Dependency |
| FD | Thai AirAsia |
| FD | Flight Director |
| FD | Finance Director |
| fd | Ferredoxins |
| FDA | Food and Drug Administration |
| FDA | Food and Drug Administration |
| FDA | Food and Drug Administration |
| FDA | Fluorescein Diacetate |
| FDA | Functional Data Analysis |
| FDA | Faisalabad Development Authority |
| FDA | Fuji Dream Airlines |
| FDA | Fully Differential Amplifier |
| FDA | Florida Dental Association |
| FDA | Forensic Data Analysis |
| FDA | Fórum Democrático Angolano |
| FDC | First Day Cover |
| FDC | First Data Corporation |
| FDC | Floppy Disk Controller |
| FDC | Flanders District of Creativity |
| FDC | Fixed Dose Combination |
| FDC | Follicular Dendritic Cell |
| FDC | Forum for Democratic Change |
| FDC | Fundação Dom Cabral |
| FDD | Floppy Disk Drive |
| FDD | Frequency-Division Duplex |
| FDD | Feature-Driven Development |
| FDD | Foundation for Defense of Democracies |
| FDD | Franchise Disclosure Document |
| FDD | Frequency Domain Decomposition |
| FDDI | Fiber Distributed Data Interface |
| FDDI | Footwear Design and Development Institute |
| FDFS | First Day First Show |
| FDFS | File Descriptor File System |
| FDI | Foreign Direct Investment |
| FDI | Fault Detection and Isolation |
| FDI | Fédération Dentaire Internationale |
| FdI | Fratelli d'Italia |
| FDI | Films Division of India |
| FDI | Financing Data Initiative |
| FDMA | Frequency Division Multiple Access |
| FDP | Free Democratic Party |
| Feb | February |
| FEB | Fédération des Entreprises de Belgique |
| FEB | Federación Española de Baloncesto |
| FEB | Força Expedicionária Brasileira |
| FEB | Sanfebagar Airport |
| FEB | Flesh Eating Bacteria |
| FEB | Flow Equalization Basin |
| FEBA | First Enterprise Business Agency |
| FEDAI | Foreign Exchange Dealers Association of India |
| FedEx | Federal Express |
| FEFKA | Film Employees Federation of Kerala |
| FEFSI | Film Employees Federation of South India |
| FEMA | Federal Emergency Management Agency |
| FEMA | Foreign Exchange Management Act |
| FERA | Food and Environment Research Agency |
| FERA | Foreign Exchange Regulation Act |
| FERA | Federal Emergency Relief Administration |
| Ferrari | named after its founder, Enzo Ferrari |
| FESPACO | Panafrican Film and Television Festival of Ouagadougou |
| FET | Field Effect Transistor |
| FFS | Amiga Fast File System |
| FFS | Fee-for-service |
| FFS | Farmer Field School |
| FFS | Formatted File System |
| FFS | Facial Feminization surgery |
| FG | Field Goal |
| FG | Field Goal |
| FG | Fine Gael |
| FG | Foggia |
| fg | foreground |
| fg | femtogram |
| FG | Fiberglass |
| FG | Family Guy |
| FG | Fréquence Gaie |
| FG | Falun Gong |
| FG% | Field Goal Percentage |
| FGM | Female Genital Mutilation |
| FGM | Functionally Graded Material |
| FHR | Fetal Heart Rate |
| FHR | First Hour Rating |
| FHR | Friday Harbor Airport |
| FHR | Федерация хоккея России |
| FHR | Federal Halocarbon Regulations |
| FHR | Firefox Health Report |
| FHR | Financial Health Rating |
| FHR | Foothill Ranch |
| FHRAI | Federation of Hotel & Restaurants Association |
| FIA | Fédération Internationale de l’Automobile |
| FIA | Federal Investigation Agency |
| FIA | Flow Injection Analysis |
| FIA | Fire Industry Association |
| FIA | Futures Industry Association |
| FIA | Farnborough International Airshow |
| FIA | Future Imagery Architecture |
| FIA | Feline Infectious Anemia |
| FIA | Financial Intermediaries Association |
| FIA | Federated Ironworkers’ Association |
| FIA | Institute of Actuaries |
| FIA | FRIENDS in Action |
| FIA | Fiscal Information Agency |
| FIAT | Fabbrica Italiana Automobili Torino |
| FIAT | Field Information Agency; Technical |
| FIAT | Fonds d'Intervention pour l'Aménagement du Territoire |
| FIAT | Felony Investigative Assistance Team |
| FIAT | Fédération Internationale des Archives de Télévision |
| FIBA | Fédération Internationale de Basketball |
| FIBA | Florida International Bankers Association |
| FIC | First International Computer |
| FIC | Flight Information Centres |
| FIC | Federal Information Center |
| FICCI | Federation of Indian Chambers of Commerce and Industry |
| FICCI | Foreign Investors’ Chamber of Commerce and Industry |
| FIDE | Fédération Internationale des Échecs |
| FIDE | Fuzzy Inference Development Environment |
| FIDE | Festival International du Documentaire Étudiant |
| FIDE | Fédération Internationale de Droit Européen |
| FIFA | Fédération Internationale de Football Association |
| FIFO | First In, First Out |
| FIFP | Foreign Investment Facilitation Portal |
| FIFP | Festival International du Film Panafricain |
| FIFRA | Federal Insecticide, Fungicide, and Rodenticide Act |
| FII | Foreign Institutional Investor |
| FII | Future Investment Initiative |
| FII | Fundo de Investimento Imobiliário |
| FII | Fabricated or Induced Illness |
| FII | Forestry Innovation Investment |
| FII | Fundación Instituto de Ingeniería |
| FIITJEE | Forum for Indian Institute of Technology Joint Entrance Examination |
| FIM | Forefront Identity Manager |
| FIM | Fédération Internationale de Motocyclisme |
| FIM | Field Ion Microscopy |
| FIM | Finnish Markka |
| FIM | Flight Interruption Manifest |
| FIM | Florida International Museum |
| FIM | Fox Interactive Media |
| FIM | Frente Independiente Moralizador |
| FIMMDA | Fixed Income Money Market and Derivatives Association of India |
| FinCEN | Financial Crimes Enforcement Network |
| FinFET | Fin Field Effect Transistor |
| Fintech | Financial Technology |
| Finviz | Financial Visualizations |
| FiO2 | Fraction of inspired oxygen |
| FIPB | Foreign Investment Promotion Board |
| FIPRESCI | Fédération Internationale de la Presse Cinématographique |
| FIPS | Federal Information Processing Standards |
| FIPS | Fixed Income Pricing System |
| FIPS | Fédération Internationale des Patrouilles de Ski |
| FIPS | First nondestructive Interactive Partition Splitter |
| FIR | First Information Report |
| FIRC | Foreign Inward Remittance Certificate |
| FIS | Financial Information System |
| FIS | Flood Insurance Study |
| FIS | Frankfurt International School |
| FIS | Front Islamique du Salut |
| FISAT | Federal Institute of Science And Technology |
| FIVIMS | Food Insecurity and Vulnerability Information and Mapping Systems |
| FLAC | Free Lossless Audio Codec |
| FLAC | Free Legal Advice Centres |
| FLEX | Future Leaders Exchange |
| FLEX | Fleet Landing Exercises |
| FLEX | Flame Extinguishment |
| FLEX | Flextronics International Limited |
| FLEX | FLuorescence EXplorer |
| Flex | Fast Lexical Analyzer |
| FLEX | Federation Licensing Examination |
| FLIR | Forward Looking Infrared |
| FLIR | from the acronym for Forward-Looking Infrared Imaging systems |
| FLOPS | Floating Point Operations Per Second |
| FLOTUS | First Lady of the United States |
| Fluke | named after its founder, John Fluke |
| FLV | Flash Video |
| FM | Frequency Modulation |
| FM | Federated States of Micronesia |
| FM | Fibromyalgia |
| FM | Facility Management |
| FM | Shanghai Airlines |
| FM | Financial Management |
| FM | Family Medicine |
| Fm | Fermium |
| FM | Football Manager |
| fm | Federated States of Micronesia (TLD) |
| fm | femtometre |
| fM | femtomolar |
| FM | FIDE Master |
| FM | Field Marshal |
| FM | Fuse Music |
| FM | Fareast Movement |
| FM | Province of Fermo |
| FM | Fannie Mae |
| FM | Future Movement |
| FM | Flower Mound |
| FM | Fludarabine and Mitoxantrone |
| FMBC | First Missionary Baptist Church |
| FMBC | Faith Mission Bible College |
| FMBC | Freddie Millar Building Consultancy |
| FMBC | Fish Museum & Biodiversity Centre |
| FMCG | Fast Moving Consumer Goods |
| FMG | Financial Markets Group |
| FMG | Fortescue Metals Group |
| FMGE | Foreign Medical Graduates Examination |
| FMI | Fondo Monetario Internacional |
| FMI | Fonds Monétaire International |
| FMI | Fundo Monetário Internacional |
| FMI | For More Information |
| FMI | Finnish Meteorological Institute |
| FMI | Food Marketing Institute |
| FMI | Foundation Medicine Inc. |
| FMI | Financial Market Infrastructure |
| FMI | First Myanmar Investment |
| FMI | Friedrich Miescher Institute |
| FMI | Functional Mock-up Interface |
| FMI | Folkebevegelsen Mot Innvandring |
| FMI | Kalemie Airport |
| FMI | FMI Air |
| FMI | Freedom Movement of Iran |
| FML | Football Manager Live |
| FML | Fluorometholone |
| FMNC | Fatima Mata National College |
| Fmr | Former |
| FMR | FerroMagnetic Resonance |
| FMR | Fair Market Rent |
| FMR | Federal Management Regulation |
| FMR | Fidelity Management & Research |
| FMR | Forced Migration Review |
| FMR | Forbundet Mot Rusgift |
| FMR | Fine Music Radio |
| FMR | Future Music Records |
| FMR | Federación Mexicana de Rugby |
| FMR | Fédération Monégasque de Rugby |
| FMR | Festival Mushroom Records |
| fMRI | Functional Magnetic Resonance Imaging |
| FMRI | Florida Marine Research Institute |
| FMSCI | Federation of Motor Sports Clubs of India |
| FOB | Freight On Board |
| FOB | Forbes Field |
| FOB | Forward Operating Base |
| FOB | Fecal Occult Blood |
| FOC | Free Of Charge |
| FOC | Fiber Optic Cable |
| FOC | Field-Oriented Control |
| FOC | Faint Object Camera |
| FOC | Flag of Convenience |
| FOC | Transformers: Fall of Cybertron |
| FOC | Falls of Cruachan |
| FOC | Federal Office of Culture |
| FOC | Fuzhou Changle International Airport |
| FOC | First Class CW Operators’ Club |
| FOC | Finnish Organization of Canada |
| FOC | Front Obrer de Catalunya |
| FOC | Far Out Corporation |
| FOLDOC | Free On-Line Dictionary of Computing |
| FollowSymLinks | Follow Symbolic Links |
| FOMO | Fear Of Missing Out |
| FOMO | Friends of Mulanje Orphans |
| FOR | Free on Road |
| FOR | Pinto Martins – Fortaleza International Airport |
| FOR | Fellowship of Reconciliation |
| for | FORTRAN Source Code |
| Ford | named after its founder, Henry Ford |
| Forex | Foreign Exchange |
| Fortran | FORmula TRANslation |
| FOSS | Free and Open Source Software |
| FOSS | Field Operational Support System |
| FOSS | Full Option Science System |
| FOSS | Forum of Small States |
| FOV | Field of View |
| FPGA | Field-Programmable Gate Array |
| FPO | Follow-on Public Offer |
| FPO | Grand Bahama International Airport |
| FPO | Field Post Office |
| FPO | Faciopalatoosseous Syndrome |
| FPO | Freiheitliche Partei Österreichs |
| FPO | Fruit Products Order |
| FPO | Frame Pointer Omission |
| FPO | Florida Philharmonic Orchestra |
| FPS | Frames Per Second |
| fps | Feet Per Second |
| FPS | First-Person Shooter |
| FPS | Federal Protective Service |
| FPS | Flexible Payments Service |
| FPS | Faster Payments Service |
| FPS | Facilities Protection Service |
| FPS | Federation of Piling Specialists |
| FPS | Frontal Protection System |
| FPS | Fast Packet Switching |
| FPS | Foundation Public School |
| FPS | Freiheits-Partei der Schweiz |
| FPS | Floating Point Systems |
| FPV | First Person View |
| FPV | Ford Performance Vehicles |
| FPV | Feline Panleukopenia Virus |
| FQDN | Fully Qualified Domain Name |
| FR | France |
| Fr | Father |
| fr | French |
| FR | Federal Register |
| Fr | Francium |
| FR | Fire Retardant |
| FR | Full Rate |
| Fr | Froude number |
| fr | France (TLD) |
| FR | Frankfurter Rundschau |
| FR | Frightened Rabbit |
| FR | Frame Relay |
| FRAGO | Fragmentary Order |
| FRBM | Federal Reserve Bank of Minneapolis |
| FRBM | Free Radical Biology and Medicine |
| FRBM | Fiscal Responsibility and Budget Management |
| FRCS | Fellowship of the Royal College of Surgeons |
| FRCS | Front Range Christian School |
| Freemium | Free + Premium |
| FRIENDS | Fast Reliable Instant Efficient Network for Disbursement of Service |
| FRM | Financial Risk Manager |
| FRM | Fixed Rate Mortgage |
| FRM | Fairmont Municipal Airport |
| FRM | Farm Pride Foods Limited |
| FRM | FoRMat |
| FRM | Faraday Rotator Mirror |
| FRN | Floating Rate Note |
| FRN | Federal Reserve Note |
| FRN | Firm Registration Number |
| FRRO | Foreigners Regional Registration Office |
| FSANZ | Food Standards Australia New Zealand |
| FSB | Front Side Bus |
| FSB | Financial Stability Board |
| FSB | Financial Services Board |
| FSB | Forward Support Battalion |
| FSB | Fuqua School of Business |
| FSC | Forest Stewardship Council |
| FSC | Financial Supervisory Commission |
| FSC | Fiji Sugar Corporation |
| FSC | Financial Services Commission |
| FSC | Financial Services Commission |
| FSc | Foo Swee Chin |
| FSC | Farmingdale State College |
| FSC | Florida Southern College |
| FSC | Financial Supervision Commission |
| FSC | Federal Shariat Court |
| FSC | Texas Forensic Science Commission |
| FSC | Fabryka Samochodów Ciężarowych |
| FSC | Fujitsu Siemens Computers |
| FSC | Field Studies Council |
| FSC | Figari–Sud Corse Airport |
| FSC | Fourier Shell Correlation |
| FSC | Framingham State University |
| FSC | Fratres Scholarum Christianarum |
| FSC | Foreign Sales Corporation |
| FSC | Federal Salary Council |
| FSC | Future Supply Chain Solutions |
| FSC | Fédération des Scouts Catholiques |
| FSC | Fire Safe Cigarettes |
| FSC | Football South Coast |
| FSC | Forest School Camps |
| FSI | Foreign Service Institute |
| FSI | Fuel Stratified Injection |
| FSI | Henry Post Army Airfield |
| FSI | Floor Space Index |
| FSLN | Frente Sandinista de Liberación Nacional |
| FSSAI | Food Safety and Standards Authority of India |
| ft | foot/feet |
| Ft | Forint |
| FT | Financial Times |
| ft | Featuring |
| FT | Fourier Transform |
| FT | Full Time |
| Ft | Impulse |
| FT | FaceTime |
| FT | Fault Tolerance |
| FT | Fluctuation Theorem |
| FT | Fire Control Technician |
| FT | Fischertechnik |
| FT | Free Throw |
| FT | Fowl Typhoid |
| FT | First Things |
| FT | Fortean Times |
| FT | Fighting Talk |
| FTC | Federal Trade Commission |
| FTC | Feathercoin |
| FTC | FIRST Tech Challenge |
| FTC | Follicular Thyroid Cancer |
| FTC | Ferencvárosi Torna Club |
| FTC | Fair Trade Commission |
| FTC | Fair Trade Commission |
| FTC | Free The Children |
| FTC | Fusion Technology Center |
| FTC | Fairfield Transportation Center |
| FTCP | Federal Technical Capability Program |
| FTCP | Florida Tobacco Control Program |
| FTFY | Fixed That For You |
| FTFY | First-Time First-Year |
| FTII | Film and Television Institute of India |
| FTII | Federasi Teknologi Informasi Indonesia |
| FTII | Fagan Test of Infant Intelligence |
| FTIR | Fourier Transform Infrared |
| FTP | File Transfer Protocol |
| FTP | Foiled Twisted Pair |
| FTP | Francs-Tireurs et Partisans |
| FTP | Functional Threshold Power |
| FtP | Free-to-Play |
| FTP | Full Tilt Poker |
| FTP | Field Training Program |
| FTP | Funds Transfer Pricing |
| FTP | Federal Theatre Project |
| FTP | Faulkes Telescope Project |
| FTP | Financial Transactions Plan |
| FTS | Fourier Transform Spectroscopy |
| FTS | Federal Technology Service |
| FTSE | Financial Times and the London Stock Exchange |
| FTTH | Fiber To The Home |
| FTTx | Fiber To The X |
| FTW | For The Win |
| FTW | Fort Worth Meacham International Airport |
| ftw | Family Tree Maker File |
| FTW | Future Technology Workshop |
| FUBU | For Us, By Us |
| Fuji | named after Mount Fuji, the highest mountain in Japan |
| FUP | Fair Usage Policy |
| FUP | Family Unification Program |
| FUP | Freshman Urban Program |
| FUPD | Front Underride Protection Device |
| FWIW | For What It’s Worth |
| FXO | Foreign eXchange Office |
| FXO | Cuamba Airport |
| FYI | For Your Information |
| FYI | For Youth Initiative |
| FYJC | First Year Junior College |
| FYROM | Former Yugoslav Republic Of Macedonia |
