

| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| FLRSL | Flag Research Centre of Sri Lanka | In English | → Organizations and associations → Flags, banners | 
| FLSA | Fair Labor Standards Act | In English | |
| FLSC | Flexible Linear-Shaped Charge | In English | |
| FLTL | Fédération Luxembourgeoise des Travailleurs du Livre | In French | → Organizations and associations → Labour, labour economics → Graphic industries, printing, publishing → Luxembourg | 
| FluQ | Fluids Quarterly | In English | → Serial publications, periodicals → Fluid mechanics | 
| FM | First Mold | In English | |
| FM | Flight Model | In English | → Aeronautics, aircraft → Astronautics | 
| FM | Fluid Module | In English | |
| FM | Fracture Mechanics | In English | → Mechanics | 
| FM | Frequency Modulated | In English | → Telecommunications | 
| FM | Frequency Modulation | In English | → Telecommunications | 
| FM | Federación Minerometalúrgica | In Spanish | → Organizations and associations → Labour, labour economics → Metallurgy | 
| FM | Frequentie Modulatie | In Dutch | → Telecommunications | 
| FM | Fiche de Modification | In French | → Quality management | 
| FM/CW | Frequency-Modulated Continuous Wave | In English | → Telecommunications | 
| FM/FM | Frequency Modulation/Frequency & Multiplexing | In English | → Telecommunications | 
| FM/PM | Frequency Modulation/Phase Modulation | In English | → Telecommunications | 
| FMA | Finanzmarktaufsicht | In German | → Finance | 
| FMA | Failure Mode Analysis | In English | |
| FMA | Finnish Medical Association = SLL | Suomen Lääkäriliitto | In Finnish = FLF | Finlands Läkarförbundet | In Swedish | In English | → Associations → Medicine | 
| FMA | (Déchets de) Faible et Moyenne Activité | In French | → Nuclear technology → Environmental technology, water supply, waste management | 
| FMAD | Fluid Management and Distribution | In English | |
| FMAG | Fluid Mechanics of Astrophysics and Geophysics | In English | → Serial publications, periodicals → Astronomy → Geophysics | 
| FMAHTS | Flight Manifest and Hardware Tracking System | In English | → Aeronautics, aircraft → Astronautics → Computer hardware | 
| FMAR | Final Mission Analysis Review | In English | |
| FMC | Fresenius Medical Care | In English | → Medicine | 
| FMC | Forward Motor Controller | In English | → Vehicle engineering | 
| FMC | Franciscan Missionaries of Saint Clare | In English | → Roman catholic church | 
| FMCA | Forward Motor Controller Assembly | In English | → Vehicle engineering | 
| FMCF | First Manned Captive Flight | In English | → Aeronautics, aircraft → Astronautics | 
| FMCS | Federal Mediation and Conciliation Services | In English | → Public administration, government | 
| FMCSA | Federal Motor Carrier Safety Administration (www.fmcsa.dot.gov) | In English | → Central administration → Vehicle engineering | 
| FMD | Foot-and-Mouth Disease | In English | → Veterinary medicine | 
| FMD | Fixed-Module Drive | In English | |
| FMD&C | Flight Mechanics, Dynamics, and Control | In English | → Aeronautics, aircraft → Astronautics | 
| FMDM | Flexible Multiplexer/Demultiplexer | In English | |
| FME | Facultat de Matemàtiques i Estadística | In Spanish | → Higher education, universities → Mathematics → Statistics | 
| FMEA | Failure Mode and Effects Analysis | In English | |
| FMEC | Forward Master Events Controller | In English | |
| FMECA | Failure Modes and Effects Criticality Analysis | In English | |
| FMEL | Fédération des Membres de l'Enseignement Laïque | In French | → Organizations and associations → Education | 
| FMH | Foederatio Medicorum Helveticorum | In Latin | → Organizations and associations → Medicine → Switzerland | 
| FMI | Fonds Monétaire International (www.imf.org) = IMF | Internacia Mon-Fonduso | In Esperanto = IMF | International Monetary Fund | In English = FMI | Fondul Monetar Internaţional | In Romanian = IMF | Internationaal Monetair Fonds | In Dutch | In French | → International relations → Finance | 
| FMI | Finnish Meteorological Institute | In English | → Meteorology, climatology | 
| FMI | Fondul Monetar Internaţional (www.imf.org) = IMF (look above) | In Romanian | → International relations → Finance | 
| FMK | Forum Mobilkommunikation | In German | → Organizations and associations → Telecommunications | 
| FMK | Field Modification Kit | In English | |
| FML | Fault Message Line | In English | |
| FML | Final Materials List | In English | |
| FMLSTP | Fonds Mondial de Lutte contre le Sida, la Tuberculose et le Paludisme | In French | → Infectious diseases | 
| FMM | Franciscan Missionaries of Mary | In English | → Roman catholic church | 
| FMM | Free Media Movement | In English | → Organizations and associations → Newspapers, journalism | 
| FMM | Faculté de Médecine de Mons | In French | → Higher education, universities → Medicine | 
| FMNR | First Nations and Métis Relations | In English | |
| FMO | Flight Medical Officer | In English | → Aeronautics, aircraft → Astronautics → Medicine | 
| FMOF | First Manned Operational Flight | In English | → Aeronautics, aircraft → Astronautics | 
| FMOF | First Manned Orbital Flight | In English | → Astronautics | 
| FMOFEV | First Manned Orbital Flight With EVA | In English | → Astronautics | 
| FMOFPL | First Manned Orbital Flight With Payload | In English | → Astronautics | 
| FMOGP | Fourgon Mousse Grande Puissance | In French | → Automobile manufacturing → Firefighting | 
| FMP | Facility Management Plan | In English | |
| FMP | Force Multinationale de Protection | In French | → Military affairs → United Nations | 
| FMP | FileMaker Pro | In English | → Software → Files | 
| FMP | Fédération Mutualiste Parisienne (www.fmp.fr) | In French | → Organizations and associations → Social welfare → France | 
| FMPAC | Fixed Multipurpose Application Console | In English | |
| FMR | Field Modification Request | In English | |
| FMR | Function Max Rate | In English | → Mathematics | 
| FMR | Forced Migration Review | In English | → Serial publications, periodicals → Migrations | 
| FMRC | Fonds Mondial de Recherche contre le Cancer (www.fmrc.fr) | In French | → Organizations and associations → Oncology | 
| fMRI | Functional Magnetic Resonance Imaging | In English | → Nuclear, atomic, and molecular physics → Diagnostics | 
| FMRU | Federacion Mexicana de Rugby (www.mexrugby.com) | In Spanish | → Organizations and associations → Football and rugby → Mexico | 
| FMS | Fédération des Médecins Suisses | In French | → Organizations and associations → Medicine → Switzerland | 
| FMS | Fluid Management System | In English | |
| FMS | Food Management Subsystem | In English | → Food technology | 
| FMS | Forms Management System | In English | |
| FMS | Functional Master Schedule | In English | |
| FMS | Fédération Motocycliste Suisse | In French | → Organizations and associations → Transport and postal services → Switzerland | 
| FMS | Flexible Modeling System | In English | → Computer simulation → Meteorology, climatology | 
| FMS | Foreign Military Sales | In English | → Military affairs | 
| FMSI | Federazione Medico Sportiva Italiana | In Italian | → Organizations and associations → Medicine → Sport, physical exercises → Italia | 
| FMSP | Frequency Modulation Signal Processor | In English | → Telecommunications | 
| FMT | Flight Management Team | In English | → Aeronautics, aircraft → Astronautics | 
| FMV | Forces Motrices Valaisannes (www.fmv.ch) | In French | → Mechanical engineering → Switzerland | 
| FMW | Fair Market Value | In English | → Finance | 
| FMX | Frequency Modulation Transmitter | In English | → Telecommunications | 
| FN | Front National | In French | → Political parties and movements | 
| FN | Forces Nouvelles | In French | → Political parties and movements | 
| FN | Feriene Naasjes (www.un.org) = UN | Unuigintaj Nacioj | In Esperanto = ONU | Organisation des Nations Unies | In French = ONU | Organizazión d'as Nazions Unitas | In Aragonese = ААН | Арганіза́цыя Аб'ядна́ных На́цый | In Belarusian = VN | Verenigde Nasies | In Afrikaans = ONU | Organización de les Naciones Uníes | In Asturian = OOH | Организацията на обединените нации | In Bulgarian = ABU | Aozadur ar Broadoù Unanet | In Breton = ПНО | Пĕрлешнĕ Нацисен Организацийĕ | In Chuvash = UN | United Nations | In English = NBE | Nazio Batuen Erakundea | In Basque = ONU | Organización das Nacións Unidas | In Occitan = UN | Unuiĝinta Naciaro | In Esperanto = UN | Ujedinjeni Narodi | In Bosnian = CN | Consociatio Nationum | In Latin = FN | Forenede Nationer | In Danish = UN | Unionita Nacioni | In Ido = ONU | Organizzazione delle Nazioni Unite | In Italian = KU | Kenedhlow Unys | In Cornish = ONU | Organització de les Nacions Unides | In Catalan = ΟΗΕ | Οργανισμός Ηνωμένων Εθνών | In Greek = ΗΕ | Ηνωμένα Έθνη | In Greek = ONU | Organización de las Naciones Unidas | In Spanish = VN | Vereinte Nationen | In German = VN | Verenigde Naties | In Dutch = VN | Vereent Natiounen | In Letzeburgesh = ООН | Организация Oбъединённых Hаций | In Russian = ONU | Organisacion des Nacions unies | In Franco-Provençal = ONZ | Organizacja Narodów Zjednoczonych | In Polish = BMT | Birlashgan Millatlar Tashkiloti | In Uzbek = ООН | Організація Об'єднаних Націй | In Ukrainian = BM | Birleşmiş Milletler | In Turkish = LHiQ | Liên Hiệp Quốc | In Vietnamese = OKB | Organizata e Kombeve të Bashkuara | In Albanian = OSN | Organizácia Spojených národov | In Slovak = OZN | Organizacija Združenih Narodov | In Slovenian = УН | Уједињене нације | In Serbian = FN | Förenta nationerna | In Swedish = UM | Umoja wa Mataifa | In Swahili = NU | Nazzioni Uniti | In Sicilian = ONU | Organizaţia Naţiunilor Unite | In Romanian = ONU | Organização das Nações Unidas | In Portuguese = VN | Vereenten Natschonen | In Low German = ST | Sameindu Tjóðir | In Faroese = HN | Huñusqa Nasyunkuna | In Quechua = PBB | Pertubuhan Bangsa-bangsa Bersatu | In Malay = NA | Náisiúin Aontaithe | In Irish = ÜRO | Ühinenud Rahvaste Organisatsioon | In Estonian = SÞ | Sameinuðu þjóðanna | In Icelandic | In Frisian | → International relations → United Nations | 
| FN | Forenede Nationer (www.un.org) = UN, ONU, ААН, VN, OOH, ABU, ПНО, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) | In Danish | → International relations → United Nations | 
| FN | Förenta nationerna = UN, ONU, ААН, VN, OOH, ABU, ПНО, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) | In Swedish | → International relations → United Nations | 
| FN | Foreign National | In English | |
| FNA | Fédération du Négoce Agricole | In French | → Organizations and associations → Trade → Agricultural sciences | 
| FNAARC | Federazione Nazionale Associazioni Agenti e Rappresentanti di Commercio | In Italian | → Organizations and associations → Trade | 
| FNAC | Fonds National d'Art Contemporain | In French | → Finance → Arts | 
| FNACA | Fédération Nationale des Anciens Combattants en Algérie (www.fnaca.org) | In French | → Organizations and associations | 
| FNAFU | Fonds National d'Aménagement Foncier et d'Urbanisme | In French | → Finance → Regional planning → Architecture | 
| FNAH | Fonds National d'Amélioration de l'Habitat | In French | → Finance → Accommodation | 
| FNAIM | Fédération NAtionale de l'IMmobilier | In French | → Organizations and associations → Accommodation | 
| FNAS | Fundo Nacional de Assistência Social | In Portuguese | → Social welfare | 
| FNAS | Federazione Nazionale Arte di Strada | In Italian | → Organizations and associations → Arts | 
| FNAS | Fédération (Française) des Négociants en Appareils Sanitaires | In French | → Organizations and associations → Trade → France | 
| FNAS | Fidelity National Agency Solutions | In English | → Insurance | 
| FNAS | Faculty of Natural and Agricultural Sciences | In English | → Higher education, universities → Biological sciences → Botany → Agricultural sciences | 
| FNAUT | Fédération Nationale des Associations d'Usagers des Transports (www.fnaut.asso.fr) | In French | → Associations → Transport and postal services → France | 
| FNB | Fédération Nationale des Boissons | In French | → Organizations and associations → Beverage industry | 
| FNB | Facultat de Nàutica de Barcelona | In Spanish | → Higher education, universities → Spain | 
| FNCAUE | Fédération Nationale des Conseils d'Architecture, d'Urbanisme et de l'Environnement (www.fncaue.fr) | In French | → Organizations and associations → Regional planning → Architecture → France | 
| FNCCR | Fédération Nationale des Collectivités Concédantes et des Régies (www.fnccr.asso.fr) | In French | → Organizations and associations → Municipal administration → France | 
| FNCCR | Fédération Nationale des Collectivités Concédantes et Régies (www.fnccr.asso.fr) | In French | → Organizations and associations → Municipal administration | 
| FNCDG | Fédération Nationale de Centres de Gestion (www.fncdg.com) | In French | → Organizations and associations → Public administration, government | 
| FNCF | Fédération Nationale des Cinémas Français (www.fncf.org) | In French | → Organizations and associations → Cinema, movies → France | 
| FNCF | Fédération Nationale des Courses Françaises (www.fncf.fr) | In French | → Organizations and associations → Entertainment → Sport, physical exercises | 
| FNCF | Fédération Nationale de la Culture Française (www.fnc.fr) | In French | → Organizations and associations → Arts | 
| FNCIVAM | Fédération Nationale des CIVAM | In French | → Organizations and associations | 
| FNCLCC | Fédération Nationale des Centres de Lutte Contre le Cancer | In French | → Organizations and associations → Oncology | 
| FNCPLA | Fédération Nationale du Commerce des Produits Laitiers et Avicoles | In French | → Organizations and associations → Food technology | 
| FNCRM | Fédération Nationale du Commerce et de la Réparation du Cycle et Motocycle (www.fncrm.fr) | In French | → Organizations and associations → Vehicle engineering → Trade | 
| FND | Facility Need Date | In English | |
| FND | Fédération Nationale de la Décoration | In French | → Organizations and associations → Architecture | 
| FNDAE | Fonds National pour le Développement des Adductions d'Eau | In French | → 626 | 
| FNDAE | Fonds National de Développement et des Adductions d'Eau | In French | → Finance → Environmental technology, water supply, waste management | 
| FNDF | Fédération Nationale des Distributeurs de Films | In French | → Organizations and associations → Cinema, movies | 
| FNDS | Fonds National pour le Développement du Sport | In French | → Sport, physical exercises | 
| FNE | France Nature Environnement (www.fne.asso.fr) | In French | → Associations → Environmental protection → Threats to the environment → France | 
| FNE | Fonds National pour l'Emploi | In French | → Labour, labour economics | 
| FNEGE | Fondation Nationale pour l'Enseignement de la Gestion des Entreprises | In French | → Foundations → Economics | 
| FNEL | Fédération Nationale des Éclaireurs et Éclaireuses du Luxembourg | In French | → Associations → Luxembourg | 
| FNFL | Forces Navales Françaises Libres | In French | → 359 → History → France | 
| FNFM | Fichier National du Faux Monnayage | In French | → Files → Law, jurisprudence → Police | 
| FNGA | Fonds National de la Gestion Administrative | In French | → Economics → Public administration, government | 
| FNGCA | Fonds National de Garantie des Calamités Agricoles | In French | → Finance → Agricultural sciences | 
| FNGEDA | Fédération Nationale des Groupes d'Études et de Développement Agricoles | In French | → Organizations and associations → Agricultural sciences | 
| FNHDR | Fédération Nationale Habitat et Développement Rural | In French | → Organizations and associations → Accommodation → Regional planning | 
| FNIC | Fonds National Interconsulaire de Compensation | In French | → Finance | 
| FNICGV | Fédération Nationale de l'Industrie et des Commerces en Gros des Viandes (www.fnicgv.com) | In French | → Organizations and associations → Food technology → France | 
| FNL | Fluctuation and Noise Letters | In English | → Serial publications, periodicals → Acoustics | 
| FNME | Fédération Nationale des Mines et de l'Énergie (www.fnme-cgt.fr) | In French | → Organizations and associations → Labour, labour economics → Mining → Energy economics → France | 
| FNMF | Fédération Nationale de la Mutualité Française | In French | → Organizations and associations → Insurance → France | 
| FNMF | Fonds National de la Micro-Finance | In French | → Finance → Development | 
| FNMR | Fédération Nationale des Médecins Radiologues (www.fnmr.org) | In French | → Organizations and associations → Medicine | 
| FNMVTC | Fonds National pour la Mise en Valeur des Terres par la Concession | In French | → Central administration → Agricultural sciences | 
| FNOC | Fleet Numeric Oceanography Center | In English | → Marine research, oceanography | 
| FNOMCeO | Federazione Nazionale degli Ordini dei Medici Chirurghi e degli Odontoiatri (www.fnomceo.it) | In Italian | → Organizations and associations → Surgery, orthopaedics, ophthalmology → Dentistry → Italia | 
| FNP | Fryske Nasjonale Partij | In Frisian | → Political parties and movements | 
| FNPF | Fédération Nationale de la Presse Française | In French | → Organizations and associations → Newspapers, journalism → France | 
| FNPP | Fundacja Polsko-Niemieckie Pojednanie | In Polish | → Foundations → Poland | 
| FNPS | Fédération Nationale de la Presse d'information Spécialisée | In French | → Organizations and associations → Newspapers, journalism | 
| FNR | Fonds National de la Recherche | In French | → Research policy | 
| FNR | Fachagentur Nachwachsende Rohstoffe | In German | → Municipal administration → Agricultural sciences → Energy economics | 
| FNR | False Negative Rate | In English | → Applied sciences, technology | 
| FNRDA | Fonds National pour la Régulation et le Développement Agricole | In French | → Central administration → Agricultural sciences | 
| FNRJ | Federativna Narodna Republika Jugoslavija = ФНРЈ | Федеративна Народна Република Југославија | In Macedonian = RPFJ | República Popular Federal da Iugoslávia | In Portuguese = ФНРЮ | Федеративной Народной Республики Югославия | In Russian | In Croatian | → Geography,→ History | 
| FNS | Fonds National de la Science | In French | → Mathematics and natural sciences | 
| FNSAI | Fédération Nationale des Syndicats d'Architectes d'Intérieur | In French | → Organizations and associations → Architecture | 
| FNSAI | Fédération Nationale des Syndicats d'Architectes d'Intérieur | In French | → Organizations and associations → Architecture | 
| FNSICAE | Fédération Nationale des Sociétés d'Intérêt Collectif Agricole d'Électricité (www.fnsicae.asso.fr) | In French | → Organizations and associations → Electrical engineering → Agricultural sciences | 
| FNSL | Fédération Nationale des Scouts du Luxembourg | In French | → Organizations and associations → Luxembourg | 
| FNSPF | Fédération Nationale des Sapeurs-Pompiers de France | In French | → Organizations and associations → Firefighting → France | 
| FNT | Failure Notification Telex | In English | → Telecommunications | 
| FNTC | Fédération Nationale des Tiers de Confiance (www.fntc.org) | In French | → Organizations and associations → Law, jurisprudence | 
| FNTP | Fédération Nationale des Travaux Publics (www.fntp.fr) | In French | → Organizations and associations → Civil engineering → France | 
| FNTR | Fédération Nationale des Transports Routiers | In French | → Organizations and associations → Transport and postal services | 
| FNTV | Fédération Nationale des Transports de Voyageurs | In French | → Organizations and associations → Transport and postal services | 
| FNUOD | Force des Nations Unies chargée d'Observer le Désengagement (http://https://peacekeeping.un.org/fr/mission/fnuod) = UNDOF | United Nations Disengagement Observer Force | In English = FNUOS | Fuerza de las Naciones Unidas de Observación de la Separación | In Spanish = FNUOS | Força das Nações Unidas de Observação da Separação | In Portuguese = СООННР | Силы Организации Объединенных Наций по Наблюдению за Разъединением | In Russian | In French | → United Nations → Polemology | 
| FNUOS | Fuerza de las Naciones Unidas de Observación de la Separación (http://https://peacekeeping.un.org/es/mission/undof) = FNUOD, UNDOF, СООННР (look above) | In Spanish | → United Nations → Polemology | 
| FNUOS | Força das Nações Unidas de Observação da Separação = FNUOD, UNDOF, СООННР (look above) | In Portuguese | → United Nations → Polemology | 
| FNV | Federatie Nederlandse Vakbeweging | In Dutch | → Organizations and associations → Labour, labour economics → Netherlands | 
| FNV | Federatie Nederlands Vakverbond (www.fnv.nl) | In Dutch | → Organizations and associations → Labour, labour economics → Netherlands | 
| FO | Fiber-Optic | In English | → Telecommunications | 
| FO | Functional Objective | In English | → Management | 
| FO | Force Ouvrière (www.force-ouvriere.fr) | In French | → Organizations and associations → Labour, labour economics → France | 
| FOAC | Finaliser, Organiser, Agir, Contrôler | In French | → Management | 
| FOAD | Formation Ouverte À Distance | In French | → Education | 
| FOAF | Friend of a Friend | In English | → Programming languages → Networks, communication | 
| FOAM | Forecasting Ocean-Atmosphere Model | In English | → Marine research, oceanography → Meteorology, climatology | 
| FOB | Flight Operations Building | In English | → Aeronautics, aircraft → Astronautics | 
| FOB | Fractional Orbit Bombardment | In English | → Astronautics → Military engineering | 
| FOBS | Fractional Orbit Bombing System | In English | → Astronautics → Military engineering | 
| FOC | Faint Object Camera | In English | |
| FOC | Fleet Operational Capability | In English | → Aeronautics, aircraft | 
| FOC | Full Operational Capability | In English | |
| FOCR | Final Operational Concept Review | In English | |
| FOCUS | ReinFOrcing CompUter Science | In English | → Computer science | 
| FOD | Flight Operations Directorate | In English | → Aeronautics, aircraft → Astronautics | 
| FOD | Federale Overheidsdienst | In Dutch | → Public administration, government | 
| FOD | Fiche d'Ordonnancement des Dotations | In French | → Finance → Accounting | 
| FODM | Field Operations Data Model | In English | → Software | 
| FODM | Friends of Dukes Meadows | In English | → Organizations and associations | 
| FODM | Friends of Dyke Mar | In English | → Organizations and associations → Environmental protection | 
| FODS | Fiber-Optic Demonstration System | In English | → Telecommunications | 
| FOE | Friends of the Earth | In English | → Organizations and associations | 
| FOE | Flight Operations Engineer | In English | → Aeronautics, aircraft → Astronautics | 
| FOE | Follow On Evaluation | In English | |
| FOF | First Operational Flight | In English | → Aeronautics, aircraft → Astronautics | 
| FOF | First Orbital Flight | In English | → Astronautics | 
| FOF | Flight Operations Facility | In English | → Aeronautics, aircraft → Astronautics | 
| FOFOS | Forum zur Förderung der Selbständigkeit | In German | → Economics | 
| FOG | Fiber-Optic Gyro | In English | → Telecommunications | 
| FoGeo | Fotointerpretacja w Geografii | In Polish | → Serial publications, periodicals → Earth sciences → Geography | 
| FOGM | Fiber-Optic Guided Missile | In English | → Military engineering → Telecommunications |