| CJI | Comitê Jurídico Interamericano = CJI | Comité Jurídico Interamericano | In Spanish = IAJC | Inter-American Juridical Committee | In English = CHI | Comité Juridique Interaméricain | In French |
In Portuguese | → International relations → Law, jurisprudence |
| CJNE | Canadian Journal of Native Education | In English | → Serial publications, periodicals → Education |
| CJSC | Closed Joint Stock Company = ЗАО | Закрытое Акционерное Общество | In Russian = ZAO | Zakrytoe Akcionernoe Obščestvo | In Russian |
In English | → Economics |
| CLA | Cantonese Language Association (http://asiane.byu.edu/cla/) | In English | → Associations → Education → Language, linguistics, literature |
| CLAD | Centro Latinoamericano de Administración para el Desarrollo (www.clad.org.ve) = CLAD | Centre Latino-américain d'Administration pour le Développement | In French = CLAD | Centro Latino-americano de Administração para o Desenvolvimento | In Portuguese |
In Spanish | → Public administration, government → Development |
| CLAD | Centre Latino-américain d'Administration pour le Développement (www.clad.org.ve) = (look above) |
In French | → Public administration, government → Development |
| CLAD | Centro Latino-americano de Administração para o Desenvolvimento (www.clad.org.ve) = (look above) |
In Portuguese | → Public administration, government → Development |
| CLADES | Centro Latinoamericano de Documentación Económica y Social = CLADES | Centre Latino-américain de Documentation Économique et Sociale | In French = CLADES | Centro Latino-americano de Documentação Econômica e Social | In Portuguese |
In Spanish | → Libraries → Economics |
| CLADES | Centre Latino-américain de Documentation Économique et Sociale = (look above) |
In French | → Libraries → Economics |
| CLADES | Centro Latino-americano de Documentação Econômica e Social = (look above) |
In Portuguese | → Libraries → Economics |
| CLAEH | Centro Latino-Americano de Economía Humana (www.claeh.org.uy) = CLAEH | Centre Latino-Américain d'Économie Humaine | In French = CLAEH | Centro Latino-americano de Economia Humana | In Portuguese |
In Spanish | → Research institutes → Economics |
| CLAEH | Centro Latino-americano de Economia Humana (www.claeh.org.uy) = (look above) |
In Portuguese | → Research institutes → Economics |
| CLAEH | Centre Latino-Américain d'Économie Humaine (www.claeh.org.uy) = (look above) |
In French | → Research institutes → Economics |
| CLAP | Comité de Liaison pour l'Alphabétisation et la Promotion | In French | → Education |
| CLASS | Chinese Language Association for Secondary School (www.classk12.org) | In English | → Associations → Education → Language, linguistics, literature |
| CLASS | Chinese Language Association for Secondary-Elementary Schools | In English | → Associations → Education → Linguistics |
| CLC | Club Langues et Civilisations | In French | → Education → Linguistics |
| CLC | Canadian Labour Congress = CTC | Congrès du Travail du Canada | In French |
In English | → Organizations and associations → Labour, labour economics |
| CLD | Conseil Local de Développement | In French | → Politics → Regional planning |
| CLEISS | Centre des Liaisons Européennes et Internationales de Sécurité Sociale | In French | → Insurance |
| CLEMI | Centre de Liaison de l'Enseignement et des Moyens d'Information | In French | → Education |
| CLF | Crédit Local de France | In French | → 33677 |
| CLI | Commission Locale d'Insertion | In French | → Social welfare |
| CLIL | Content and Language Integrated Learning | In English | → Education → Language, linguistics, literature |
| CLILiG | Content and Language Integrated Learning in German | In English | → Education → Language, linguistics, literature |
| CLIN | Contract Line Item Number | In English | → 3474 |
| CLIP | Comité de Liaison et d'Informations Parlementaires | In French | → Parliaments, representation |
| CLM | Commissione Psico-pedagogica | In Italian | → Psychology → Education |
| CLM | Commissione delle Lingue moderne | In Italian | → Education → Language, linguistics, literature |
| CLOUS | Centre Local des Oeuvres Universitaires et Scolaires | In French | → Education |
| CLPB | Chinese Law Prof Blog | In English | → Law, jurisprudence |
| CLRAE | Congress of Local and Regional Authorities of Europe | In English | → European Union |
| CLRB | Cost Limit Review Board | In English | → Prices |
| CLTA | Chinese Language Teachers' Association | In English | → Associations → Education → Language, linguistics, literature |
| CLTA | Chinese Language Teachers Association (http://clta-us.org) | In English | → Associations → Education → Language, linguistics, literature |
| CLTAD | Centre for Learning & Teaching in Art & Design | In English | → Education → Arts |
| CLTASA | Chinese Language Teachers' Association of South Australia | In English | → Associations → Education → Language, linguistics, literature |
| CLTAV | Chinese Language Teachers' Association of Victoria | In English | → Associations → Education → Language, linguistics, literature |
| CLTFA | Chinese Language Teachers' Federation of Australia | In English | → Organizations and associations → Education → Language, linguistics, literature |
| CLU | Commissione Liceo-Università | In Italian | → Education |
| CLUW | Coalition of Labor Union Women | In English | → Organizations and associations → Labour, labour economics → Feminism |
| CLV | Commission Langues Vivantes | In French | → Education → Language, linguistics, literature |
| CMAO | Contract Management Assistance Officer | In English | → 3474 |
| CMC | Centraal Missie Commissariaat | In Dutch | → Organizations and associations → Development |
| CMCA | Consejo Monetario Centroamericano | In Spanish | → International economic cooperation |
| CMCAS | Caisse Mutuelle Complémentaire et d'Action Sociale | In French | → Social welfare |
| CMDS | Cumbre Mundial sobre el Desarrollo Sostenible = WSSD | World Summit on Sustainable Development | In English = SMDD | Sommet Mondial sur le Développement Durable | In French = CMDS | Cúpula Mundial de Desenvolvimento Sustentável | In Portuguese |
In Spanish | → International relations → Nature and society |
| CMDS | Cúpula Mundial de Desenvolvimento Sustentável = WSSD, SMDD (look above) |
In Portuguese | → International relations → Nature and society |
| CME | Conseil Mondial de l'Énergie = CME | Consiliul Mondial al Energiei | In Romanian = WEC | World Energy Council | In English |
In French | → Organizations and associations → International relations → Energy economics |
| CME | Consiliul Mondial al Energiei = WEC (look above) |
In Romanian | → Organizations and associations → International relations → Energy economics |
| CMEA | Council for Mutual Economic Assistance | In English | → International economic cooperation |
| CMIE | Centre Médical Interentreprises Europe | In French | → Labour, labour economics → Medicine |
| CMN | Contract Master Network | In English | → 3474 |
| CMNUCC | Convenio Marco de las Naciones Unidas sobre Cambio Climático (http://unfccc.int) = UNFCCC | United Nations Framework Convention on Climate Change | In English = CCNUCC | Convention-Cadre des Nations Unies sur les Changements Climatiques | In French = CQNUMC | Convenção-Quadro das Nações Unidas sobre Mudança de Clima | In Portuguese = UNFCCC | 聯合國氣候變化綱要公約 | In Chinese = КИК | Рамочная конвенция ООН об изменении климата | In Russian = UNFCCC | 気候変動枠組条約 | In Japanese = UNFCCC | 기후 변화에 관한 국제 연합 기본 협약 | In Korean |
In Spanish | → United Nations → Meteorology, climatology |
| CMP | Code des Marchés Publics | In French | → Law, jurisprudence → Public administration, government |
| CMPP | Centre médico-psycho-pédagogique | In French | → Psychology → Education → Medicine |
| CMR | Caisse Mutuelle Régionale | In French | → Insurance |
| CMR | Contractor Management Review | In English | → 3474 |
| CMR | Comitetul Naţional Român | In Romanian | → Public administration, government |
| CMS | Center for Migration Studies | In English | → Migrations → Sociology |
| CMS | Contract Master Schedule | In English | → 3474 |
| CMS | Concerned Member State | In English | → International relations |
| CMSA | Caisse de Mutualité Sociale Agricole | In French | → Insurance → Agricultural sciences |
| CMSR | Centro Mondialità Sviluppo Reciproco | In Italian | → Organizations and associations → Development |
| CMT | Confédération Mondiale du Travail | In French | → International relations → Labour, labour economics |
| CMU | Carnegie Mellon University (www.cmu.edu) | In English | → Higher education, universities |
| CN | Consociatio Nationum (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 = FN | Feriene Naasjes | In Frisian = 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 = 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 | FRP = 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 | NDS = 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 Latin | → International relations → United Nations |
| CNAC | Commission Nationale d'Arbitrage et de Contrôle | In French | → Political parties and movements |
| CNAC | Comité National Anti-Contrefaçon | In French | → Criminal law |
| CNACA | Comissão Norte-americana de Cooperação Ambiental (www.cec.org) = CCAAN | Comisión para la Cooperación Ambiental de América del Norte | In Spanish = NACEC | North American Commission for Environmental Cooperation | In English = CNACE | Commission Nord-Américaine de Coopération Environnementale | In French |
In Portuguese | → International relations → Nature |
| CNACE | Commission Nord-Américaine de Coopération Environnementale (www.cec.org) = CNACA, CCAAN, NACEC (look above) |
In French | → International relations → Nature |
| CNADT | Conseil National d'Aménagement et de Développement du Territoire | In French | → Public administration, government → Regional planning |
| CNAF | Caisse Nationale des Allocations Familiales | In French | → Social welfare |
| CNAFMC | Caisse Nationale d'Allocations Familiales des Marins du Commerce | In French | → Social welfare → Transport and postal services |
| CNAFNI | Caisse Nationale d'Allocations Familiales de la Navigation Intérieure | In French | → Social welfare → Transport and postal services |
| CNAFPM | Caisse Nationale d'Allocations Familiales de la Pêche Maritime | In French | → Social welfare → Fishing, hunting |
| CNAM | Caisse Nationale d'Assurance Maladie | In French | → Insurance |
| CNAM | Conservatoire National des Arts et Métiers | In French | → Specialized or (poly)technical colleges → Applied sciences, technology |
| CNAMTS | Caisse Nationale d'Assurance Maladie des Travailleurs Salariés | In French | → Labour, labour economics → Insurance |
| CNAS | Casa Naţională de Asigurări de Sănătate | In Romanian | → Public administration, government → Medicine |
| CNAV | Caisse Nationale d'Assurance Vieillesse | In French | → Insurance |
| CNAVPL | Caisse Nationale d'Assurance Vieillesse des Professions Libérales | In French | → Labour, labour economics → Insurance |
| CNAVTS | Caisse Nationale d'Assurance Vieillesse des Travailleurs Salariés | In French | → Labour, labour economics → Insurance |
| CNB | Caisse Nationale des Banques | In French | → Banks → Insurance |
| CNB | Conseil National des Barreaux | In French | → Law, jurisprudence |
| CNBF | Caisse Nationale des Barreaux Français | In French | → Law, jurisprudence → Insurance |
| CNBM | Confédération du Négoce de Bois et Matériaux | In French | → Organizations and associations → Trade → Timber and woodworking industry |
| CNC | Conseil National du Commerce | In French | → Organizations and associations → Trade |
| CNC | Consejo Nacional para la reactivación de la Producción y la Competitividad | In Spanish | → Economics |
| CNC | Comitê de Negociações Comerciais = CNC | Comité de Negociaciones Comerciales | In Spanish = TNC | Trade Negotiations Committee | In English = CNC | Comité des Négociations Commerciales | In French |
In Portuguese | → International economic cooperation |
| CNC | Comité des Négociations Commerciales = TNC (look above) |
In French | → International economic cooperation |
| CNC | Comité de Negociaciones Comerciales = TNC (look above) |
In Spanish | → International economic cooperation |
| CNC | Conseil National de la Communication | In French | → Organizations and associations → 359 |
| CNCA | Caisse Nationale de Crédit Agricole | In French | → Banks → Agricultural sciences |
| CNCCFP | Commission Nationale des Comptes de Campagne et des Financements Politiques | In French | → International relations |
| CNCL | Commission Nationale de la Communication et des Libertés | In French | → Telecommunications → Politics |
| CNCP | Catálogo Nacional de Cualificaciones Profesionales | In Spanish | → Labour, labour economics |
| CNCPI | Compagnie Nationale des Conseils en Propriété Intellectuelle | In French | → Industrial property → Artistic property |
| CNCSIS | Consiliul National al Cercetarii Stiintifice din Învatamântul Superior | In Romanian | → Research policy → Higher education, universities |
| CNDC | Comisión Nacional de Defensa de la Competencia | In Spanish | → Central administration → Trade |
| CNDP | Centre National de Documentation Pédagogique | In French | → Libraries → Education |
| CNE | Contrat Nouvelle Embauche | In French | → Labour, labour economics |
| CNEA | Comisión Nacional de Energía Atómica (www.cnea.gov.ar) | In Spanish | → Central administration → Nuclear technology |
| CNEC | Centre National d'Enseignement par Correspondance | In French | → Education |
| CNED | Centre National d'Enseignement à Distance | In French | → 374 |
| CNEFEI | Centre national d'Études et de Formation pour l'Enfance Inadaptée | In French | → Education |
| CNEPT | Centrul Naţional de Educaţie Permanentă în Turism | In Romanian | → Tourism → Education |
| CNER | Conseil National des Économies Régionales (www.cner-france.com) | In French | → Economics |
| CNESER | Conseil National de l'Enseignement Supérieur et de la Recherche | In French | → Education → Mathematics and natural sciences |
| CNESSS | Centre National d'Études Supérieures de la Sécurité Sociale | In French | → Insurance → Specialized or (poly)technical colleges |
| CNFPP | Centre National de Formation et de Perfectionnement des Professeurs | In French | → Education |
| CNFPT | Centre National de la Fonction Publique Territoriale | In French | → Public administration, government → Education |
| CNFTSV | Centre National de Formation des Techniciens des Services Vétérinaires | In French | → Specialized or (poly)technical colleges → Agricultural sciences |
| CNGR | Coordination Nationale de la Gauche Républicaine | In French | → Political parties and movements |
| CNHI | Cité Nationale de l'Histoire de l'Immigration | In French | → Museums → Migrations |
| CNI | Carte Nationale d'Identité | In French | → Public administration, government |
| CNI | Caisse Nationale de l'Industrie | In French | → Economics → Social welfare |
| CNIC | Commission Nationale d'Interprétation et de Conciliation | In French | → Organizations and associations → Law, jurisprudence |
| CNIL | Commission Nationale de l'Informatique et des Libertés (www.cnil.fr) | In French | → Computer science → Politics |
| CNIL | Commission Nationale Informatique et Libertés | In French | → Organizations and associations → Computer science → Fundamental rights |
| CNIT | Consorzio Nazionale Interuniversitario per le Telecomunicazioni | In Italian | → Higher education, universities → Telecommunications |
| CNIT | Centrul Naţional de Învăţământ Turistic | In Romanian | → Tourism |
| CNL | Confédération Nationale du Logement | In French | → Organizations and associations → Accommodation |
| CNMA | Caisse Nationale de crédit Mutuel Agricole | In French | → Banks → Agricultural sciences |
| CNMCCA | Confédération Nationale de la Mutualité, de la Coopération et du Crédit Agricole | In French | → Organizations and associations → Insurance → Agricultural sciences |
| CNMHS | Caisse Nationale des Monuments Historiques et des Sites | In French | → Public administration, government → History |
| CNMSS | Caisse Nationale Militaire de Sécurité Sociale | In French | → Public administration, government → Insurance |
| CNOUS | Centre National des Œuvres Universitaires et Scolaires | In French | → Social welfare → Education |
| CNP | Caisse Nationale de Prévoyance | In French | → Social welfare |
| CNPADAS | Casa Naţională de Pensii şi Alte Drepturi de Asigurări Sociale | In Romanian | → Public administration, government → Social welfare |
| CNPAS | Casa Naţională de Pensii şi Alte Drepturi de Asigurări Sociale | In Romanian | → Public administration, government → Social aid |
| CNPEJ | Commission Nationale Paritaire de l'Emploi des Journalistes | In French | → Newspapers, journalism → Labour, labour economics |
| CNPF | Conseil National du Patronat Français | In French | → Organizations and associations → Labour, labour economics |
| CNPF | Centre National du Patronat Français | In French | → Economics |
| CNPI | Centre National de Promotion des Investissements | In French | → 33972 |
| CNPR | Confederaţia Naţională a Patronatului Român | In Romanian | → Organizations and associations → Labour, labour economics |
| CNR-CME | Comitetul Naţional Român al Consiliului Mondial al Energiei | In Romanian | → Public administration, government → Energy economics |
| CNRACL | Caisse Nationale de Retraite des Agents des Collectivités Locales | In French | → Labour, labour economics → Public administration, government → Insurance |
| CNRB | Caisse Nationale de Retraite de la Batellerie | In French | → Labour, labour economics → Insurance → Transport and postal services |
| CNRD | Concours National de la Résistance et de la Déportation | In French | → Education → History |
| CNSAD | Conservatoire National Supérieur d'Art Dramatique | In French | → Specialized or (poly)technical colleges → Theatre → Dance |
| CNSMDP | Conservatoire National Supérieur de Musique et de Danse de Paris | In French | → Specialized or (poly)technical colleges → Music → Dance |
| CNSS | Caisse Nationale de Sécurité Sociale | In French | → Central administration → Insurance |
| CNTB | Chủ nghĩa tư bản | In Vietnamese | → Economics |
| CNU | Conseil National des Universités | In French | → Higher education, universities |
| CNUAH | Centro de las Naciones Unidas para los Asentamientos Humanos = UNCHS | United Nations Centre for Human Settlements | In English = CNUEH | Centre des Nations Unies pour les Établissements Humains | In French = CNUAH | Centro das Nações Unidas sobre Assentamentos Humanos | In Portuguese |
In Spanish | → United Nations → Accommodation |
| CNUAH | Centro das Nações Unidas sobre Assentamentos Humanos = UNCHS, CNUEH (look above) |
In Portuguese | → United Nations → Accommodation |
| CNUCED | Conférence des Nations-Unies pour le Commerce et le Développement | In French | → International relations → Trade |
| CNUCED | Conférence des Nations Unies sur le Commerce et le Développement (www.unctad.org) = UNCTAD | United Nations Conference on Trade and Development | In English = ЮНКТАД | Конференция на ООН за търговия и развитие | In Bulgarian = CNUCYD | Conferencia de las Naciones Unidas sobre Comercio y Desarrollo | In Spanish = KUNKD | Konferenco de la Unuiĝintaj Nacioj pri Komerco kaj Disvolvado | In Esperanto = UNCTAD | გაეროს ვაჭრობისა და განვითარების კონფერენცია | In Georgian = UNCTAD | การประชุมสหประชาชาติว่าด้วยการค้าและการพัฒนา | In Thai = UNCTAD | 聯合國貿易及發展委員會 | In Chinese = ICTR | International Criminal Tribunal for Rwanda | In English = TPIR | Tribunal Penal Internacional para Ruanda | In Spanish = TPIR | Tribunal Pénal International pour le Rwanda | In French = MTKR | Międzynarodowy Trybunał Karny dla Rwandy | In Polish = MTTR | Medzinárodný Trestný Tribunál pre Rwandu | In Slovak |
In French | → United Nations → Trade → Development |
| CNUCYD | Conferencia de las Naciones Unidas sobre Comercio y Desarrollo (www.unctad.org) = CNUCED, UNCTAD, ЮНКТАД, KUNKD, ICTR, TPIR, MTKR, MTTR (look above) |
In Spanish | → United Nations → Trade → Development |
| CNUDCI | Commission des Nations Unies pour le Droit Commercial International (www.uncitral.org) = UNCITRAL | United Nations Commission on International Trade Law | In English = ЮНСИТРАЛ | Комиссия Организации Объединенных Наций по праву международной торговли | In Russian = CNUDMI | Comisión de las Naciones Unidas para el Derecho Mercantil Internacional | In Spanish = NTU | Natsionalna Telekompaniya Ukraïny | In Ukrainian = НТУ | Національна Телекомпанія України | In Ukrainian |
In French | → United Nations → International law → Commercial law |
| CNUDMI | Comisión de las Naciones Unidas para el Derecho Mercantil Internacional (www.uncitral.org) = CNUDCI, UNCITRAL, ЮНСИТРАЛ, NTU, НТУ (look above) |
In Spanish | → United Nations → International law → Commercial law |
| CNUE | Consiliul Notariatelor din Uniunea Europeanã | In Romanian | → Law, jurisprudence → International relations |
| CNUED | Conférence des Nations Unies sur l'Environnement et le Développement | In French | → Development → United Nations → Nature, |
| CNUEH | Centre des Nations Unies pour les Établissements Humains = CNUAH, UNCHS (look above) |
In French | → United Nations → Accommodation |
| CO | Contracting Officer | In English | → 3474 |
| COB | Commission des Opérations de Bourse (www.cob.fr) | In French | → Finance |
| COBA | Cost Benefit Analysis | In French | → Prices |
| COC | Committee on Curricula | In English | → Education |
| CoCAC | Conseiller de Coopération et d'Action Culturelle | In French | → International relations → Civilization, culture, progress → Arts |
| COCEF | Comissão de Cooperação Ecológica Fronteiriça = COCEF | Comisión de Cooperación Ecológica Fronteriza | In Spanish = BECC | Border Environment Cooperation Commission | In English |
In Portuguese | → International relations → Nature and society |
| COCEF | Comisión de Cooperación Ecológica Fronteriza = BECC (look above) |
In Spanish | → International relations → Nature and society |
| COCOMO | Constructive Cost Model | In English | → Prices |
| CODEC | Comité Départemental d'Examen des Comptes des Organismes de Sécurité Sociale | In French | → Public administration, government → Insurance |
| CODEFI | Comité Départemental pour le Financement des Entreprises | In French | → Insurance |
| CODERPA | Comité Départemental des Retraites et Personnes Agées | In French | → Labour, labour economics → Insurance |
| CODES | Comisia consultativă interministerială în domeniul egalităţii de şanse între femei şi bărbaţi | In Romanian | → Central administration |
| CODEV | COopération et DÉVeloppement | In French | → Organizations and associations → Development |
| CODEVI | COmpte pour le DEVeloppement Industriel | In French | → Finance |
| CODIS | Centre Opérationnel Départemental d'Incendie et de Secours | In French | → Public administration, government |
| COE | Centro Orientamento Educativo | In Italian | → Organizations and associations → Education |
| COE | Conseil d'Orientation pour l'Emploi | In French | → Labour, labour economics |
| COF | Cost Of Facilities | In English | → Prices |
| COFACE | Compagnie Française d'Assurance pour le Commerce Extérieur | In French | → Trade |
| COFIPAC | Compagnie Française d'Investissement, de Participation, d'Assistance et de Coopération | In French | → Economics |
| COFRAS | Compagnie Française d'Assistance Spécialisée | In French | → Social welfare |
| COGEPA | Compagnie Générale de Participation | In French | → Economics |
| COI | Commission de l'Océan Indien (www.coi-ioc.org) = IOC | Indian Ocean Commission | In English |
In French | → International relations |
| COLA | Cost-Of-Living Adjustment | In English | → Prices |
| COMAC | Comité d’Action Militaire | In French | → 355 |
| COMECON | Council of Mutual Economic Assistance = СЭВ | Совет экономической взаимопомощи | In Russian = CAEM | Conseil d'Assistance Économique Mutuelle | In French = СИВ | Съвет за икономическа взаимопомощ | In Bulgarian = CAEM | Consell d'Assistència Econòmica Mútua | In Catalan = KREH | Konsilio de Reciproka Ekonomia Helpo | In Esperanto = RGW | Rat für gegenseitige Wirtschaftshilfe | In German = CAME | Consejo de Ayuda Mutua Económica | In Spanish = KGST | Kölcsönös Gazdasági Segítség Tanácsa | In Hungarian = SEV | Sovet Ekonomitšeskoi Vzaimopomoštši | In Russian = KNER | Këshilli i Ndihmës Ekonomike Reciproke | In Albanian = RVHP | Rada vzájemné hospodářské pomoci | In Czech = RWPG | Rada Wzajemnej Pomocy Gospodarczej | In Polish = CAER | Consiliul de Ajutor Economic Reciproc | In Romanian = RVHP | Rada vzájomnej hospodárskej pomoci | In Slovak = HĐTTKT | Hội đồng Tương trợ kinh tế | In Vietnamese = РЕВ | Рада Економічної Взаємодопомоги | In Ukrainian |
In English | → International relations → Economics |
| COMESA | Common Market for Eastern and Southern Africa | In English | → International relations → International economic cooperation |
| COMEXI | Consejo de Comercio Exterior e Inversiones | In Spanish | → Organizations and associations → Trade |
| COMI | Cooperazione per il Mondo in via di Sviluppo | In Italian | → Organizations and associations → Development |
| COMPAS | Centre on Migration, Policy and Society | In English | → Migrations → Sociology |
| COMT | Commission des Marchés à Terme de Marchandises | In French | → Finance → Trade |
| CONAD | Consorzio Nazionale Dettaglianti | In Italian | → Organizations and associations → Trade |
| CONAD | Congresso Nacional de Administração | In Portuguese | → Congresses → Public administration, government |
| CONAPRI | Consejo Nacional de Promoción de Inversiones | In Spanish | → 33972 |
| CONFAPI | Confederazione Italiana della Piccola e Media Industria | In Italian | → Organizations and associations → Economic policy |
| CONPIROM | Confederaţia Patronală din Industria Română | In English | → Organizations and associations → Industry, industrial policy |
| COPM | Canadian Occupational Performance Measure | In English | → Psychology → Labour, labour economics |
| COPS | Comité politique et de sécurité | In French | → Politics → 355 |
| COR | Contracting Officer Representative | In English | → 3474 |
| COR | Clasificarea Ocupaţiilor din România | In Romanian | → Economics |
| CORINNA | Cooperation of Regions for Innovation | In English | → International relations → Engineering, technology |
| CORPEI | Corporación de Promoción de Exportaciones e Inversiones | In Spanish | → 33972 |
| CORS | Centrum Ogólnopolskich Rejestrów Sądowych i Informatyzacji Resortu (www.cors.gov.pl) | In Polish | → Central administration → Law, jurisprudence |
| CORTECHS | Convention de formation pour les techniciens supérieurs | In French | → Education |
| COS | Coefficient d'Occupation des Sols | In French | → Accommodation → Regional planning |