| CHA | Caribbean Hotel Association | In English | → 33848 |
| CHA | Canadian Hockey Association | In English | → Sport, physical exercises |
| CHA | Canadian Historical Association = SHC | Société Historique du Canada | In French |
In English | → History |
| CHLA | Canadian Health Libraries Association = ABSC | Association des Bibliothèques de la Santé du Canada | In French |
In English | → Libraries → Medicine |
| CJA | Christlich-Jüdische Arbeitsgemeinschaft Basel | In German | → Judaism → Christianity |
| ĈJEA | Ĉina Junulara Esperanto-Asocio = ĈJEA | 中国における青年エスペラント団体です | In Japanese |
In Esperanto | |
| CJSA | China Judaic Studies Association | In English | → Judaism → Language, linguistics, literature → Geography, biography, history |
| CLA | Cantonese Language Association (http://asiane.byu.edu/cla/) | In English | → Education → Language, linguistics, literature |
| CLASS | Chinese Language Association for Secondary-Elementary Schools | In English | → Education → Linguistics |
| CLASS | Chinese Language Association for Secondary School (www.classk12.org) | In English | → Education → Language, linguistics, literature |
| CLTA | Chinese Language Teachers Association (http://clta-us.org) | In English | → Education → Language, linguistics, literature |
| CLTA | Chinese Language Teachers' Association | In English | → Education → Language, linguistics, literature |
| CLTA-GNY | Chinese Language Teachers' Association of Greater New York | In English | → Language, linguistics, literature |
| CLTASA | Chinese Language Teachers' Association of South Australia | In English | → Education → Language, linguistics, literature |
| CLTAV | Chinese Language Teachers' Association of Victoria | In English | → Education → Language, linguistics, literature |
| COAL | Coal Overseas Association Limited | In English | |
| CompTIA | Computing Technology Industry Association | In English | → Computer science |
| COMRA | China Ocean Minerals Research and Development Association | In English | → Marine research, oceanography → Mining |
| CPA | Canadian Psychological Association = SCP | Société Canadienne de Psychologie | In French |
In English | → Psychology |
| CPIA | Canadian Plastics Industry Association (www.cpia.ca) | In English | → Plastic industry |
| CREA | Canadian Real Estate Association | In English | → Accommodation |
| CSA | California Sociological Association | In English | → Sociology |
| CSA | Canadian Soccer Association | In English | → Sport, physical exercises |
| CSAA | Canadian Sociology and Anthropology Association | In English | → Sociology |
| CSAUS | Chinese School Association in the United States | In English | → Education → Language, linguistics, literature |
| CSBA | Canadian Swine Breeders Association (www.canswine.ca) | In English | → Agricultural sciences |
| CSVA | Confederate States Vexillological Association | In English | → 9299 |
| CTAA | Centre Technique d'Aide aux Associations | In French | → Applied sciences, technology |
| CVMA | Canadian Veterinary Medical Association (www.canadianveterinarians.net) | In English | → Veterinary medicine |
| DAGM | Deutsche Arbeitsgemeinschaft für Mustererkennung | In German | → Computer-based techniques |
| DAGV | Deutsche Arbeitsgemeinschaft Genealogischer Verbände | In German | |
| DAMA | Data Management Association (www.dama.org) | In English | → Knowledge management → Data |
| DBLA | Don Bosco Lay Association | In English | → Roman catholic church |
| DCVMA | District of Columbia Veterinary Medical Association | In English | → Veterinary medicine |
| DEA | Dana Esperanto-Asocio (www.esperanto.dk) = EfD | Esperantoforeningen for Danmark | In Danish |
In Esperanto | |
| DEA | Development Education Association | In English | → Education |
| DEFA | Dana Esperantista Fervojista Asocio | In Esperanto | → Rail transport engineering → Transport and postal services |
| DEUA | Disabled Ebay Users Association | In English | → Internet → Trade |
| DFSA | Digital Free Software Association | In English | → Software |
| DKEA | Demokrata Kongolanda Esperanto-Asocio | In Esperanto | |
| DPOA | Detroit Police Officers Association | In English | → Police |
| EAB | Esperanto Association of Britain (www.esperanto-gb.org) = EAB | Esperanto-Asocio de Britio | In Esperanto |
In English | |
| EAB | Esperanto-Asocio de Britio (www.esperanto-gb.org) = (look above) |
In Esperanto | |
| EABCT | European Association of Behavioural and Cognitive Therapies | In English | → Psychology |
| EACE | European Association of Cognitive Ergonomics (www.eace.info) | In English | → Human-computer interaction |
| EACE | European Association for Cognitive Ergonomics (www.eace.info) | In English | → Human-computer interaction |
| EACEM | European Association of Consumer Electronics Manufacturers | In English | → Electronics |
| EACL | European Association of Chinese Linguistics | In English | → Linguistics |
| EACS | European Association of Chinese Studies | In English | → Language, linguistics, literature |
| EADO | European Association of Dermato-Oncology | In English | → Dermatology → Oncology |
| EADTU | European Association of Distance Teaching Universities | In English | → Higher education, universities → 374 |
| EAEA | East Asian Economic Association | In English | → Economics |
| EAF | Esperanto-Asocio de Finnlando (www.esperanto.fi) | In Esperanto | |
| EAFA | European Aluminium Foil Association | In English | → Metallurgy |
| EAIE | European Association for International Education | In English | → Education |
| EAJRS | European Association of Japanese Resource Specialists | In English | → Language, linguistics, literature |
| EAJS | European Association for Japanese Studies | In English | → Language, linguistics, literature |
| EAJS | European Association for Jewish Studies | In English | → Judaism |
| EALA | European Air Law Association | In English | → Law, jurisprudence → Aeronautics, aircraft → 65 |
| EAMSA | Euro-Asia Management Studies Association | In English | → Management |
| EAP | European Association for Psychotherapy | In English | → Psychology |
| EAPP | European Association for Professional Piercing (www.eapp.eu) | In English | |
| EAPP | European Association of Personality Psychology (www.eapp.org) | In English | → Psychology |
| EAPPI | European Association of the Plasma Products Industry | In English | → Pharmacology, toxicology |
| EARTO | European Association of Research and Technology Organisations | In English | → Research policy → Engineering, technology |
| EASA | Esperanto Asocio de Suda Afriko | In Esperanto | |
| EASAS | European Association for South Asian Studies | In English | → Language, linguistics, literature → Geography, biography, history |
| EASL | European Association of Sinological Librarians | In English | → Libraries → Language, linguistics, literature |
| EASPD | European Association of Service providers for Persons with Disabilities (www.easpd.org) | In English | |
| EASSA | European Association of South Asian Archaeologists | In English | → Archeology |
| EATA | European Association for Telematic Applications | In English | → Telecommunications |
| EAŬ | Esperantista Asocio de Ŭonbulismo | In Esperanto | |
| EAU | European Association of Urology | In English | → Urology |
| ECCA | European Cable Communications Association | In English | → Telecommunications |
| ECFA | European Children's Film Association (www.ecfaweb.org) | In English | → Cinema, movies |
| ECRIN | Association Échange et Coordination Recherche INdustrie | In French | → Research policy → Engineering, technology |
| EDMA | European Diagnostic Manufacturers Association | In English | → Diagnostics |
| EEA | European Economic Association | In English | → Economics |
| EECA | European Electronic Component Manufacturers Association | In English | → Electronics |
| EEEE | Ελληνική Εθνική Ένωση κατά της Επιληψίας (www.epilepsy-greece.com) | In Greek | → Neurology |
| EEPCA | European Electrical Products Certification Association | In English | → Electrical engineering |
| EFDA | European Fusion Development Association (www.efda.org) | In English | → 53912 → Nuclear technology |
| EFTA | European Free Trade Association (www.efta.int) = ESVO | Evropské sdružení volného obchodu | In Czech = AELE | Association Européenne de Libre-Échange | In French = JFA | Jeropeeske Frijhannelsassosjaasje | In Frisian = EMAE | Europako Merkataritza Askearen Elkartea | In Basque = AELE | Associacion eropèèna de libro-èchanjo | In Franco-Provençal = AELC | Asociación Europea de Libre Comercio | In Spanish = ELKA | Eŭropa Liber-Komerca Asocio | In Esperanto = EFTA | 欧洲自由贸易联盟 | In Chinese = EVA | Europese Vrijhandelsassociatie | In Dutch = AELE | Associacion Europèa de Liure Escambi | In Occitan = ЕСТА | Европска Слободна Трговска Асоцијација | In Macedonian = AELS | Asociaţia Europeană a Liberului Schimb | In Romanian = ЄАВТ | Європейська асоціація вільної торгівлі | In Ukrainian = ЕФТА | Европска слободна трговинска асоцијација | In Serbian = EZVO | Európske združenie voľného obchodu | In Slovak = ЕАСТ | Европейская ассоциация свободной торговли | In Russian |
In English | → Trade |
| EFTA | 欧洲自由贸易联盟 (www.efta.int) = ESVO, AELE, JFA, EMAE, AELC, ELKA, EVA, ЕСТА, AELS, ЄАВТ, ЕФТА, EZVO, ЕАСТ (look above) |
In Chinese | → Trade |
| EHA | European Hematology Association | In English | → Blood and circulatory system |
| EHA | Economic History Association | In English | → Economics → History |
| EIA | Electrical Industries Association (www.eia.org) | In English | → Electrical engineering |
| EIGA | European Industrial Gases Association (www.eiga.org) | In English | → Chemical technology |
| EJA | Esperanta Jura Asocio | In Esperanto | → Law, jurisprudence |
| ELKA | Eŭropa Liber-Komerca Asocio (www.efta.int) = EFTA, ESVO, AELE, JFA, EMAE, AELC, EVA, ЕСТА, AELS, ЄАВТ, ЕФТА, EZVO, ЕАСТ (look above) |
In Esperanto | → Trade |
| EMA | Elephant Manager's Association (www.elephant-managers.com) | In English | → Zoology |
| EMAE | Europako Merkataritza Askearen Elkartea (www.efta.int) = EFTA, ESVO, AELE, JFA, AELC, ELKA, EVA, ЕСТА, AELS, ЄАВТ, ЕФТА, EZVO, ЕАСТ (look above) |
In Basque | → Trade |
| EMAS | Esperantista Manĉa Asocio (www.ame-emas.tk) = AME | Asociación Manchega de Esperanto | In Spanish |
In Esperanto | |
| EMIRAcle | European Manufacturing and Innovation Research Association (www.emiracle.eu) | In English | → Applied sciences, technology |
| ENQA | European Association for Quality Assurance in Higher Education (www.enqa.eu) | In English | → Higher education, universities |
| EPA | Esperanto-Propaganda Asocio de Oomoto | In Esperanto | |
| EPFA | European Plasma Fractionation Association | In English | → Pharmacology, toxicology |
| EPIA | European Photovoltaic Industry Association | In English | → Energy economics → Electrical engineering |
| ERA | Esperanto Radikala Asocio | In Esperanto | → Political parties and movements |
| ERA | European Ramblers Association (www.era-ewv-ferp.org) = EWV | Europäische Wandervereinigung | In French = FERP | Fédération Européenne de Randonnée Pédestre | In French |
In English | → Sport, physical exercises |
| ERIS@ | European Regional Information Society Association | In English | → Computer science → Telecommunications |
| ERISA | European Regional Information Society Association | In English | → Networks, communication → Telecommunications |
| ESA | European Sociological Association | In English | → Sociology |
| ESA | European Sulphuric Acid Association (www.sulphuric-acid.org) | In English | → Chemicals |
| ESAPA | European Soda Ash Producers Association | In English | → Chemicals |
| ESIST | European association for Studies in Screen Translation (www.esist.org) | In English | → Cinema, movies → Linguistics |
| ESPA | European Salt Producers' Association | In English | → Food technology |
| ESVO | Evropské sdružení volného obchodu (www.efta.int) = EFTA, AELE, JFA, EMAE, AELC, ELKA, EVA, ЕСТА, AELS, ЄАВТ, ЕФТА, EZVO, ЕАСТ (look above) |
In Czech | → Trade |
| EUA | European Universities Association (www.eua.be) | In English | → Higher education, universities |
| EUPHA | European Public Health Association | In English | → Public health and hygiene |
| EURADA | European Association of Development Agencies | In English | → Economics |
| EURALARM | Association of European Manufacturers and Installers of Fire and Security Systems | In English | |
| EurASEAA | European Association of Southeast Asian Archaeologists | In English | → Archeology |
| EURO-CIU | European Association of Cochlear Implant Users | In English | → Surgery, orthopaedics, ophthalmology |
| EUROBAT | Association of European Storage Battery Manufacturers | In English | |
| EUROKKA | Esperanto-Rok-Asocio | In Esperanto | → Music |
| EUROSEAS | European Association for South East Asian Studies | In English | → Language, linguistics, literature → Geography, biography, history |
| EUSCEA | European Science Events Association | In English | → Mathematics and natural sciences |
| EUZEPA | European Zeolites Producers Association (www.zeodet.org) | In English | → Chemicals |
| EVA | Europese Vrijhandelsassociatie (www.efta.int) = EFTA, ESVO, AELE, JFA, EMAE, AELC, ELKA, ЕСТА, AELS, ЄАВТ, ЕФТА, EZVO, ЕАСТ (look above) |
In Dutch | → Trade |
| EVA | European Vending Association | In English | |
| EVA | Esperantlingva Verkista Asocio (www.everk.org) | In Esperanto | → Arts |
| EVER | European Association for Vision and Eye Research (www.ever.be) | In English | → Ophtalmology |
| EWA | European Water Association | In English | → Hydrology → Environmental technology, water supply, waste management |
| EWV | Europäische Wandervereinigung (www.era-ewv-ferp.org) = ERA, FERP (look above) |
In French | → Sport, physical exercises |
| EZVO | Európske združenie voľného obchodu (www.efta.int) = EFTA, ESVO, AELE, JFA, EMAE, AELC, ELKA, EVA, ЕСТА, AELS, ЄАВТ, ЕФТА, ЕАСТ (look above) |
In Slovak | → Trade |
| FABIR | Fédération des Associations Belges d'Insuffisants Rénaux | In French | → Urology |
| FADBEN | Fédération des associations des enseignants-documentalistes de l'Éducation nationale | In French | → Libraries → Education |
| FAPA | Florida Association of Property Appraisers (www.fapa.net) | In English | → 332 |
| FASO | Federal Association of Security Officials (www.faso-afrs.ca) = AFRS | Association Fédérale des Responsables de la Sécurité | In English |
In English | |
| FAT | Filozofia Asocio Tutmonda | In Esperanto | → Philosophy, psychology |
| FEDA | Foodservice Equipment Distributors Association | In English | → Food technology |
| FEDPAG | Federation for Professional Associations for Guidance | In English | → Education |
| FERP | Fédération Européenne de Randonnée Pédestre (www.era-ewv-ferp.org) = ERA, EWV (look above) |
In French | → Sport, physical exercises |
| FFEA | Franca Fervojista Esperanto-Asocio = AFCE | Association Française des Cheminots pour l'Espéranto | In French |
In Esperanto | → Rail transport engineering → Transport and postal services |
| FFEA | Florida Festivals and Events Association | In English | → Entertainment |
| FIEA | Forest Industry Engineering Association | In English | → Forestry |
| FIFA | Fédération Internationale de Football Association = FIFA | Federación Internacional de Fútbol Asociado | In Spanish |
In French | → Sport, physical exercises |
| FIRA | Fédération Inter-Européenne de Rugby Association | In French | → Football and rugby |
| FLEJA | Flandra Esperanto-Junulara Asocio | In Esperanto | |
| FMA | Finnish Medical Association = SLL | Suomen Lääkäriliitto | In Finnish = FLF | Finlands Läkarförbundet | In Swedish |
In English | → Medicine |
| FNEL | Fédération Nationale des Éclaireurs et Éclaireuses du Luxembourg | In French | |
| FSAC | Film Studies Association of Canada | In English | → Cinema, movies |
| FSMS | Florida Association of Cadastral Mappers (www.fsms.org) | In English | → 332 |
| FTAA | Federation of Turkish American Associations | In English | |
| GAAO | Georgia Association of Assessing Officials (www.gaao.org) | In English | → 332 |
| GAIPDM | Greek Association of Image Processing and Digital Media | In English | → Computer-based techniques |
| GEA | Germana Esperanto-Asocio (www.esperanto.de/gea/) | In Esperanto | |
| GLRA | German Leprosy and Tuberculosis Relief Association | In English | → Pathology |
| GPSA | Great Plains Sociological Association | In English | → Sociology |
| GSA | Georgia Sociological Association | In English | → Sociology |
| GWAV | Great Waters Association of Vexillology | In English | → 9299 |
| HanEA | Hanoja Esperanto-Asocio | In Esperanto | |
| HAVSOM | Heraldry and Vexilology Society of Malta | In English | → 9299 |
| HDZG | Hrvatsko Društvo za Zastave i Grbove = RTGC | Radio-televizija Crne Gore | In Serbian = RTGC | Радио Телевизија Црне Горе | In Serbian = CAHV | Croatian Association for Heraldry and Vexillology | In English |
In Croatian | → 9299 |
| HEA | Hungara Esperanto-Asocio | In Esperanto | |
| HESCA | Health Sciences Communications Association (www.hesca.org) | In English | → Medicine |
| HFPA | Hollywood Foreign Press Association (www.goldenglobes.org) | In English | → Newspapers, journalism → Cinema, movies |
| HKEA | Honkonga Esperanto-Asocio | In Esperanto | |
| HKJEA | Honkonga Junulara Esperanto-Asocio = HKJEA | 香港の青年エスペラント団体です | In Japanese |
In Esperanto | |
| HoMAI | Hologram Manufacturers Association of India | In English | → Optics |
| HSA | Hungarian Studies Association | In English | → Area studies |
| IAA | International Association for Assyriology | In English | → Language, linguistics, literature → Archeology |
| IAAO | International Association of Assessing Officers (www.iaao.org) | In English | |
| IAAS | International Association of Agricultural Students (www.iaasworld.org) | In English | → Higher education, universities → Agricultural sciences |
| IABA | Inter-American Bar Association (www.iaba.org) | In English | → Law, jurisprudence |
| IABEM | International Association for Boundary Element Methods | In English | → Mathematics |
| IABO | Internacia Asocio de Bibliistoj kaj Orientalismoj | In Esperanto | → Christianity |
| IABS | International Association of Buddhist Studies | In English | → Buddhism |
| IACL | International Association of Chinese Linguistics | In English | → Linguistics |
| IACR | International Association for Cryptologic Research (www.iacr.org) | In English | → Mathematics → Telecommunications |
| IACW | International Association of Crime Writers = AIEP | Asociación Internacional de Escritores Policiácos | In Spanish |
In English | → Literature → Criminology |
| IAD | Internacia Asocio pri Disvolvado |
In Esperanto | → International relations |
| IAdEM | Internacia Asocio de Esperantistaj Matematikistoj | In Esperanto | → Mathematics |
| IAEA | Internacia Agrikultura Esperanto-Asocio | In Esperanto | → Agricultural sciences |
| IAEP | International Association of Equine Practitioners | In English | → Veterinary medicine |
| IAESTE | International Association for the Exchange of Students for Technical Experience (www.iaeste.org) | In English | → Higher education, universities → Applied sciences, technology |
| IAF | International Association of Facilitators | In English | |
| IAH | International Association of Hydrogeologists | In English | → 5325 → Hydrology |
| IAHA | International Association of Historians of Asia | In English | → History |
| IAHR | International Association of Hydraulic Engineering and Research | In English | → Environmental technology, water supply, waste management |
| IAHS | International Association of Hydraulical Sciences | In English | → Environmental technology, water supply, waste management |
| IAIN | International Association of the Navigation Institutes | In English | → Geodesy, cartography → Vehicle engineering |
| IALANA | International Association of Lawyers Against Nuclear Arms | In English | → Law, jurisprudence → Nuclear technology → Applied sciences, technology |
| IALL | International Association of Law Libraries (www.iall.org) | In English | → Libraries → Law, jurisprudence |
| IALS | International Association of Literary Semantics | In French | → Literature |
| IAM | International Association of Machinists | In English | → Mechanical engineering |
| IAPS | International Association of Patristics Studies = AIEP | Association Internationale des Études Patristiques | In French |
In English | → Archeology → Roman catholic church |
| IAPS | International Association for People-environment Studies | In English | → Nature and society |
| IAPS | International Association for the Philosophy of Sport | In English | → Philosophy, psychology → Sport, physical exercises |
| IAPS | International Association of Physics Students | In English | → Education → Physics |
| IAPS | International Association of Pastel Societies | In English | |
| IAPS | Independent Association of Prep Schools | In English | → Education |
| IAS | International Association of Sufism | In English | → Islam |
| IASP | Indian Association for the Study of Population | In English | → Demography |
| IASP | International Association of Science Parks | In English | → Museums → Mathematics and natural sciences |
| IASS | International Association for Semiotic Studies = AIS | Association Internationale de la Sémiotique | In French |
In English | → Semiotics |
| IASS | International Association of Sanskrit Studies | In English | → Language, linguistics, literature |
| IASSI | Indian Association of Social Science Institutions | In English | → Social sciences |
| IASTAM | International Association for the Study of Traditional Asian Medicine | In English | → 6158 |
|