| FMS | Fédération des Médecins Suisses | In French | → Medicine |
| FMSI | Federazione Medico Sportiva Italiana | In Italian | → Medicine → Sport, physical exercises |
| FNA | Fédération du Négoce Agricole | In French | → Trade → Agricultural sciences |
| FNAARC | Federazione Nazionale Associazioni Agenti e Rappresentanti di Commercio | In Italian | → Trade |
| FNAIM | Fédération NAtionale de l'IMmobilier | In French | → Accommodation |
| FNAS | Federazione Nazionale Arte di Strada | In Italian | → Arts |
| FNAS | Fédération (Française) des Négociants en Appareils Sanitaires | In French | → Trade |
| FNAUT | Fédération Nationale des Associations d'Usagers des Transports | In French | → Transport and postal services |
| FNB | Fédération Nationale des Boissons | In French | → Beverage industry |
| FNCAUE | Fédération Nationale des Conseils d'Architecture, d'Urbanisme et de l'Environnement (www.fncaue.fr) | In French | → Regional planning → Architecture |
| FNCCR | Fédération Nationale des Collectivités Concédantes et des Régies | In French | |
| FNCF | Fédération Nationale des Cinémas Français (www.fncf.org) | In French | → Cinema, movies |
| FNCIVAM | Fédération Nationale des CIVAM | In French | |
| FNCLCC | Fédération Nationale des Centres de Lutte Contre le Cancer | In French | → Oncology |
| FNCPLA | Fédération Nationale du Commerce des Produits Laitiers et Avicoles | In French | → Food technology |
| FND | Fédération Nationale de la Décoration | In French | → Architecture |
| FNDF | Fédération Nationale des Distributeurs de Films | In French | → Cinema, movies |
| FNE | France Nature Environnement | In French | → Nature → Environment, environmental sciences |
| 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 |
| FNGEDA | Fédération Nationale des Groupes d'Études et de Développement Agricoles | In French | → Agricultural sciences |
| FNHDR | Fédération Nationale Habitat et Développement Rural | In French | → Accommodation → Regional planning |
| FNICGV | Fédération Nationale de l’Industrie et des Commerces en Gros des Viandes | In French | → Food technology |
| FNME | Fédération Nationale des Mines et de l'Énergie | In French | → Energy economics → Mining |
| FNMF | Fédération Nationale de la Mutualité Française | In French | → Insurance |
| FNMR | Fédération Nationale des Médecins Radiologues (www.fnmr.org) | In French | → Medicine |
| FNOMCeO | Federazione Nazionale degli Ordini dei Medici Chirurghi e degli Odontoiatri | In Italian | → Surgery, orthopaedics, ophthalmology |
| FNPF | Fédération Nationale de la Presse Française | In French | → Newspapers, journalism |
| FNPP | Fundacja Polsko-Niemieckie Pojednanie | In Polish | → Foundations |
| FNPS | Fédération Nationale de la Presse d'information Spécialisée | In French | → Newspapers, journalism |
| FNSAI | Fédération Nationale des Syndicats d'Architectes d'Intérieur | In French | → Architecture |
| FNSAI | Fédération Nationale des Syndicats d'Architectes d'Intérieur | In French | → Architecture |
| FNSL | Fédération Nationale des Scouts du Luxembourg | In French | |
| FNTC | Fédération Nationale des Tiers de Confiance | In French | → Law, jurisprudence |
| FNTP | Fédération Nationale des Travaux Publics (www.fntp.fr) | In French | → Civil engineering |
| FNTR | Fédération Nationale des Transports Routiers | In French | → Transport and postal services |
| FNTV | Fédération Nationale des Transports de Voyageurs | In French | → Transport and postal services |
| FNV | Federatie Nederlandse Vakbeweging | In Dutch | → Labour, labour economics |
| FO | Force Ouvrière | In French | → Labour, labour economics |
| FODM | Friends of Dukes Meadows | In English | |
| FODM | Friends of Dyke Mar | In English | → Nature |
| FOE | Friends of the Earth | In English | |
| FOM | (Stichting voor) Fundamenteel Onderzoek der Materie | In Dutch | → Foundations → 620 |
| FOP | Fédération Française des Producteurs d’Oléagineux et de Protéagineux | In French | → Agricultural sciences |
| FOPI | Forum der forschenden pharmazeutischen Industrie | In German | → Pharmacology, toxicology |
| FORU | Federation of Oceania Rugby Union | In English | → Football and rugby |
| FPB | Forum of Private Businesses | In English | |
| FPC | Fédération des Promoteurs Constructeurs | In French | → Building |
| FPJ | Federación de Estatal Pensionistas y Jubilados | In Spanish | → Labour, labour economics |
| FPJQ | Fédération Professionnelle des Journalistes du Québec | In French | → Newspapers, journalism |
| FQC | Fondation Québécoise du Cancer | In French | → Foundations → Oncology |
| FR | Företagarnas Riksorganisation | In Swedish | |
| FRALA | Fédération des Radios Associatives Limousin Auvergne | In French | → Telecommunications |
| FRAMA | Fédération des Radios Associatives Maine - Anjou | In French | → Telecommunications |
| FRANC-LR | Fédération des Radios Associatives Non Commerciales Languedoc Roussillon | In French | → Telecommunications |
| FRANC-MP | Fédération des Radios Associatives Non Commerciales Midi Pyrénées | In French | → Telecommunications |
| FRANC-RA | Fédération des Radios Associatives Non Commerciales Rhône-Alpes | In French | → Telecommunications |
| FRANF | Fédération des Radios Associatives du Nord de la France | In French | → Telecommunications |
| FRAPNA | Fédération Rhône-Alpes de Protection de la Nature | In French | → Nature → Environment, environmental sciences |
| FRBR | Fédération Royale Belge de Rugby | In French | → Football and rugby |
| FRC | Flag Research Center (www.flagresearchcenter.com) | In English | → 9299 |
| FREMP | Fédération Régionale des Entreprises du Multimédia en Midi-Pyrénées (www.fremp.org) | In French | → Computer science → Cinema, movies |
| FREMP | Fédération Régionale des Entreprises de Multimédia de Midi-Pyrénées | In French | → Telecommunications → Graphic industries, printing, publishing |
| FRTC | Fédération des Radios et Télévisions Chrétiennes | In French | → Telecommunications → Christianity |
| FSA | Flags Society of Australia (www.flagsaustralia.com.au) | In English | → 9299 |
| FSA | Fédération Suisse des Avocats = SAV | Schweizerischer Anwaltsverband | In German |
In French | → Law, jurisprudence |
| FSAC | Film Studies Association of Canada | In English | → Associations → Cinema, movies |
| FSAP | Federación de Servicios y Administraciones Públicas | In Spanish | → Labour, labour economics → Public administration, government |
| FSB | Federation of Small Businesses | In English | → Economic policy |
| FSC | Fortuna Sittardia Combinatie | In Dutch | → Sport, physical exercises |
| FSCL | Fédération du Sport Cycliste Luxembourgeois | In French | → Sport, physical exercises |
| FSF | Free Software Foundation | In English | → Foundations → Software |
| FSi | Forsvars- og sikkerhetsindustriens forening | In Norwegian | → Military engineering |
| FSJM | Fórum Social da Juventude do Mercosul | In Portuguese | → Congresses |
| FSL | Flight Simulation Laboratory | In English | → Research institutes → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| FSL | Flight Systems Laboratories | In English | → Research institutes → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| FSLSA | Fédération des Sociétés Luxembourgeoises des Sports Athlétiques | In French | → Sport, physical exercises |
| FSMS | Florida Association of Cadastral Mappers (www.fsms.org) | In English | → Associations → 332 |
| FSN | Fédération Suisse des Notaires | In French | → Law, jurisprudence |
| FSP | Fédération Suisse des Psychologues = FSP | Föderation der Schweizer Psychologinnen und Psychologen | In German |
In French | → Psychology |
| FSP | Föderation der Schweizer Psychologinnen und Psychologen = (look above) |
In German | → Psychology |
| FSUGAr | Free Software Users Group Arlon | In English | → Software |
| FSV | Feijenoordse Sport Vereniging | In Dutch | → Sport, physical exercises |
| FSV | Fijnaartse Sport Vereniging | In Dutch | → Sport, physical exercises |
| FTAA | Federation of Turkish American Associations | In English | → Associations |
| FTF | Funktionærernes og Tjenestemændenes Fællesråd | In Danish | → Labour, labour economics → Public administration, government |
| FTI | Forum per la Tecnologia della Informazione | In Italian | → Computer science → Telecommunications |
| FTPH | Forschungsinstitut für technische Physik | In German | → Research institutes → Engineering, technology |
| FTW | Forschungszentrum Telekommunikation Wien (www.ftw.at) | In German | → Research institutes → Telecommunications |
| FULBI | Fédération des Utilisateurs de Logiciels de Bibliothèque | In French | → Libraries → Computer science |
| FUNDACYT | Fundación para la Ciencia y la Tecnología | In Spanish | → Foundations → Mathematics and natural sciences → Applied sciences, technology |
| FVC | Friese Voetbal Club | In Dutch | → Football and rugby |
| FVJC | Fédération Vaudoise des Jeunesses Campagnardes | In French | |
| FVM | Fédération des Villes Moyennes | In French | → Municipal administration |
| FVV | Foxholter Voetbal Vereniging | In Dutch | → Football and rugby |
| FZO | Flats Zeist Oost | In Dutch | → Sport, physical exercises |
| FZR | Forchungszentrum Rossendorf | In German | → Research institutes |
| G3L | Groupe pour la promotion de GNU/Linux et des Logiciels Libres | In French | → Software → Operating systems |
| GAAO | Georgia Association of Assessing Officials (www.gaao.org) | In English | → Associations → 332 |
| GAE | Grupos Armados Españoles | In Spanish | → 355 |
| GAEO | Groupe Armement de l'Europe Occidentale = WEAO | Western European Armaments Organisation | In English |
In French | → Military engineering |
| GAG | Jongeren Activiteiten Groep | In Dutch | |
| GAIPDM | Greek Association of Image Processing and Digital Media | In English | → Associations → Computer-based techniques |
| GAL | Grupos Antiterroristas de Liberación | In Spanish | → 355 |
| GAM | Groupe Archéologique du Mesmontois | In French | → Archeology |
| GART | Groupement des Autorités Responsables de Transports | In French | → Public administration, government → Transport and postal services |
| GART | Groupement des Autorités Responsables des Transports | In French | → Transport and postal services |
| GAVC | Grouwster Athletiek Voetbal Club | In Dutch | → Football and rugby |
| GAVC | Grouwse Arbeiders Voetbal Club | In Dutch | → Football and rugby |
| GBF | Gesellschaft für Biotechnologische Forschung | In German | → Biotechnology |
| GBO | Groupement Belge des Omnipraticiens | In French | → Medicine |
| GBS | Groupement Belge des Spécialistes | In French | → Medicine |
| GBV | Gemeinsamer Bibliotheksverbund | In German | → Libraries |
| GCLW | General Confederation for Lebanese Workers | In English | → Labour, labour economics |
| GCRAI | Groupe Consultatif pour la Recherche Agronomique Internationale | In French | → Biological sciences → Agricultural sciences |
| GCSV | Groningse Christelijke Sport Vereniging | In Dutch | → Christianity → Sport, physical exercises |
| GDA | Gabriël del Adalorata | In Dutch | → Sport, physical exercises |
| GDA | Gesamtverband der Aluminiumindustrie | In German | → Metallurgy |
| GDC | Genderen Drongelen Combinatie | In Dutch | → Sport, physical exercises |
| GDCh | Gesellschaft Deutscher Chemiker | In German | → Chemistry |
| GDO | Grande Distribuzione Organizzata | In Italian | → Transport and postal services |
| GDS | Groot Door Samenwerking | In Dutch | → Sport, physical exercises |
| GEA | Groupe des Écoles Aéronautiques et spatiales | In French | → Specialized or (poly)technical colleges → Aeronautics, aircraft → 6297 |
| GEA | Germana Esperanto-Asocio (www.esperanto.de/gea/) | In Esperanto | → Associations |
| GEAN | Georgia Environmental Action Network | In English | → Nature |
| GEB | Gemeentelijke Energie Boys | In Dutch | → Sport, physical exercises |
| GECT | Groupement Européen de Coopération Transfrontalière = GEKT | Grupoj Eŭropaj je Koopero Teritoria | In Esperanto = PSI | Paul Scherrer Institut | In German |
In French | → International relations |
| GEDEM | Groupement des Éditeurs et Diffuseurs d’Éducatif Multimédia (www.gedem.org) | In French | → Computer science → Education → Cinema, movies |
| GEIPI | Groupement d'Écoles d'Ingénieurs à Préparation Intégrée | In French | → Specialized or (poly)technical colleges → Engineering, technology |
| GEJ | Guanabara Esperanto Junularo | In Esperanto | |
| GEJ | Germana Esperanto-Junularo (www.esperanto.de/gej) | In Esperanto | |
| GEKT | Grupoj Eŭropaj je Koopero Teritoria = GECT, PSI (look above) |
In Esperanto | → International relations |
| GEL | Germana Esperanto-Ligo | In Esperanto | |
| GELAHN | Groupe des Enseignants de Langues Anciennes de Normandie | In French | → Education → Linguistics |
| GEMA | Groupement des Entreprises Mutuelles d'Assurances | In French | → Insurance |
| GEMPPM | Groupe d'Études de Métallurgie Physique et de Physique des Matériaux | In French | → Research institutes → Physics → Metallurgy |
| GEO | Garmerwolde En Omstreken | In Dutch | → Sport, physical exercises |
| GEPRAF | Grupo de Esperanto-Parolantaj Radio-Amatoroj en Francio | In Esperanto | → Telecommunications |
| GERPAC | Groupe d'Évaluation et de Recherche sur la Protection en Atmosphère Contrôlée | In French | → Pharmacology, toxicology |
| GESAC | Groupement Européen des Sociétés d'Auteurs et Compositeurs (www.gesac.org) | In French | → Literature → Music → Artistic property |
| GESEAS | Global Eagle Strategic Empowerment Alliance Systems | In English | |
| GESTA | Galder En Strijbeek Ten Aanval | In Dutch | → Sport, physical exercises |
| GET | Groupe des Écoles de Télécommunications (www.get-telecom.fr) | In French | → Specialized or (poly)technical colleges → Telecommunications |
| GET | Groupe des Écoles des Télécommunications | In French | → Specialized or (poly)technical colleges → Telecommunications |
| GFC | Groupe Français de la Céramique | In French | → 666 |
| GFC | Goorsche Football Club | In Dutch | → Football and rugby |
| GFC | Grubbenvorster Football Club | In Dutch | → Football and rugby |
| GFEV | Groupe Français d'Étude des Vascularites | In French | → Blood and circulatory system → Pathology |
| GFI | Groupe des Fédérations Industrielles (www.industrie-gfifrance.com) | In French | → Industry, industrial policy |
| GFII | Groupement Français de l'Industrie de l'Information | In French | → Libraries |
| GFMS | Georgian Foundrymen and Material Scientists Society | In English | → Metallurgy |
| GfW | Gesellschaft für Weltraumforschung | In German | → Astronomy → Spaceflight engineering, astronautics |
| GGC | Groupe Génétique et Cancer | In French | → Research institutes → Genetics → Oncology |
| GGFP | Gesellschaft für Gemeindepsychologische Forschung und Praxis | In German | → Psychology |
| GGK | Gemeentelijk Gasbedrijf Keileweg | In Dutch | → Sport, physical exercises |
| GHC | Groene Hart Combinatie | In Dutch | → Sport, physical exercises |
| GHI | German Historical Institute | In English | → History |
| GI | Geophysical Institute | In English | → Research institutes → Geophysics |
| GI | Gesellschaft für Informatik (www.gi-ev.de) | In German | → Computer science |
| GIE | Groupement d'Intérêt Économique | In French | → Economics |
| GIE-SIPS | Groupement d'Intérêt Économique - Système d'Infomation sur les Produits de Santé | In French | → Pharmacology, toxicology |
| GIFAM | Groupement Interprofessionnel des Fabricants d'Appareils d'Équipement Ménager | In French | → Engineering, technology |
| GIFTS | Global Initiative to Fight Trafficking and Slavery | In English | → Slavery |
| GIMELEC | Groupement des Industries de Matériels d’Équipement Électrique et de l’Électronique industrielle associée | In French | → Electrical engineering → Electronics |
| GIP | Groupement d'Intérêt Public | In French | → Politics |
| GIP-SIM | Groupement Interprofessionnel de Promotion des Systèmes d'Information Médico-sociale | In French | |
| GIRCEP | Groupement des Industries et Centres de Recherche en Électronique de Puissance | In French | → Electrical engineering |
| GIRM | Gruppo Interdivisionale Risonanze Magnetiche | In Italian | → Chemistry |
| GIRM | Gesellschaft für integriertes Risikomanagement | In German | → Management |
| GIRPR | Gruppo Italiano Ricercatori in Pattern Recognition | In Italian | → Computer-based techniques |
| GIS | Groupement d'Intérêt Scientifique | In French | → Mathematics and natural sciences |
| GIS | Genome Institute of Singapore | In English | → Research institutes → Biotechnology |
| GITEP | Groupement des Industries de Télécommunications et d'Électronique Professionnelle | In French | → Electronics → Telecommunications |
| GITEP | Grupo de Intercambio Tecnológico de Explotaciones Porcinas | In Spanish | → Agricultural sciences |
| GITEP TICS | Groupement des Industries des Technologies de l'Information et de la Communication | In French | → Computer science → Telecommunications" |
| GITT | Groupement des Industries du Transport et du Tourisme | In French | → Tourism → Transport and postal services |
| GJF | Gesellschaft für Japanforschung | In German | → Area studies |
| GJS | Gorkumse Jonge Spartaan | In Dutch | → Sport, physical exercises |
| GKC | Gasselte Kostvlies Combinatie | In Dutch | → Sport, physical exercises |
| GKE | Gobernuz Kanpoko Erakunde = ONGs | Organizações Não Governamentais | In Portuguese = NGO | Non-Governmental Organization | In English = NGO | Nichtregierungsorganisation | In German = ANG | Aozadur Nann-Gouarnamantel | In Breton = ONG | Organisation Non Gouvernementale | In French = NRO | Ne-Registara Organizo | In Esperanto = ONG | Organizzazione non governativa | In Italian = LSM | Lembaga Swadaya Masyarakat | In Indonesian = ONG | Organización non gobernamental | In Galician = ONG | Organización no gubernamental | In Spanish = ΜΚΟ | Μη κυβερνητικές οργανώσεις | In Greek = NNO | Nevládní nezisková organizace | In Czech = ONG | Organització no governamental | In Catalan = ННО | Неурядові неприбуткові організації | In Ukrainian = ONG | Organização não governamental | In Portuguese = NGO | Niet-gouvernementele organisatie | In Dutch = NVO | Nevyriausybinė organizacija | In Lithuanian |
In Basque | |
| GLFA | Groupement des Lamineurs et Fileurs d'Aluminium | In French | → Metallurgy |
| GLRA | German Leprosy and Tuberculosis Relief Association | In English | → Associations → Pathology |
| GLZ | Geestdrift Leert Zegevieren | In Dutch | → Sport, physical exercises |
| GMA | Gruppo Missioni Asmara | In Italian | |
| GMI | Groupement des Métiers de l’Imprimerie | In French | → Graphic industries, printing, publishing |
| GMM | Gruppo Missionario Merano | In Italian | |
| GMMAFG | Global Multimedia Mobility Architecture Framework Group | In English | → Telecommunications |
| GMMCG | Global Multimedia Mobility Co-ordination Group | In English | → Telecommunications |
| GNCR | Groupement National des Cinémas de Recherche (www.cinemas-de-recherche.com) | In French | → Cinema, movies |
| GNPI | Gesellschaft für Neonatologie und Pädiatrische Intensivmedizin | In English | → Obstetrics → Pediatry |
| GNPÖ | Gesellschaft für Neuropsychologie Österreich | In German | → Psychology → Neurology |
| GNV | Gruppo Nazionale per la Vulcanologia (http://gnv.ingv.it) | In Italian | → Research institutes → 55121 |
| GÖCH | Gesellschaft Österreichischer Chemiker | In German | → Chemistry → Chemical technology |
| GOES | Gezamenlijk Opwaarts, Eendrachtig Sterker | In Dutch | → Sport, physical exercises |
| GOLTO | Grondig Oefenen Leidt Tot Overwinnen | In Dutch | → Sport, physical exercises |
| GOMOS | Gezamenlijk Oefenen Maakt Ons Sterker | In Dutch | → Sport, physical exercises |
| GONA | Gezonde Ontspanning Na Arbeid | In Dutch | → Sport, physical exercises |
| GOSCON | Government Open Source Conference | In English | → Congresses → Software |
| GOVA | Giro Ontspannings Vereniging Arnhem | In Dutch | → Sport, physical exercises |
| GOZ | Gemengd Oranje Zwart | In Dutch | → Sport, physical exercises |