| BPP | Bourse de perfectionnement professionnel | In French | → Education |
| BPU | Bordereau de Prix Unitaire | In French | → Prices |
| BPU | Bordereau de Prix Unitaires | In French | |
| BR | Bâtiment Réacteur | In French | → Nuclear technology |
| BrdU | Bromodéoxyuridine | In French | → Biochemistry, biophysics |
| BRE | Bilan Rénovation Électricité | In French | → Electrical engineering |
| BREC | Brigade Régionale d'Enquête et de Coordination | In French | → Police |
| BRED | Banque Régionale d'Escompte et de Dépôt | In French | → Banks |
| BREDA | Bureau Régional de l'Unesco pour l'Éducation en Afrique | In French | → International relations → Education |
| BRF | Bois Raméal Fragmenté | In French | → Forestry |
| BRF | Brigade des Réseaux Férrés | In French | → Public administration, government → Transport and postal services |
| BRGM | Bureau de Recherches Géologiques et Minières | In French | → Earth sciences → Mining |
| BRI | Brigade de Recherches et d'Intervention | In French | → Police |
| BRI | Bureau Régional d'Information | In French | |
| BRMA | Bureau de Recherches Minières en Algérie | In French | → Mining |
| BRS | Banque Régionale de Solidarité | In French | → Banks → Development |
| BSAF | Bulletin de la Société Astronomique de France | In French | → Serial publications, periodicals → Astronomy |
| BSFE | Bulletin de la Société Française d'Égyptologie | In French | → Serial publications, periodicals → Archeology |
| BSPCE | Bons de Souscription de Parts de Créateur d'Entreprise | In French | → Finance |
| BSPF | Bulletin de la Societé Préhistorique Française | In French | → Serial publications, periodicals → Prehistory |
| BSR | Brevet de Sécurité Routière | In French | → Education → Transport and postal services |
| BSRSL | Bulletin de la Société Royale des Sciences de Liège | In French | → Serial publications, periodicals → Mathematics and natural sciences |
| BT | Bon de Travail | In French | |
| BT | Basse Tension | In French | → Electrical engineering |
| BTA | Brevet de Technicien Agricole | In French | → Education → Agricultural sciences |
| BTAN | Bons du Trésor à taux fixe et à intérêts annuels | In French | → Finance |
| BTF | Bons du Trésor à taux fixes | In French | → Finance |
| BTM | Brevet Technique des Métiers | In French | → Education |
| BTP | Bâtiment Travaux Publics | In French | → Civil engineering → Building |
| BTP | Bâtiments et Travaux Publics | In French | → Civil engineering → Building |
| BTR | Boîtier de Téléreport | In French | → Electrical engineering |
| BTS | Brevet de Technicien Supérieur | In French | → Specialized or (poly)technical colleges |
| BTS | Bureau Technique Syndical | In French | → Organizations and associations → Labour, labour economics |
| BTSA | Brevet de Technicien Supérieur Agricole | In French | → Specialized or (poly)technical colleges → Agricultural sciences |
| BU | Bibliothèque Universitaire | In French | → Libraries |
| BuAsR | Bulletin Astronomique, Revue Générale des Travaux Astronomiques | In French | → Serial publications, periodicals → Astronomy |
| BuAst | Bulletin Astronomique | In French | → Serial publications, periodicals → Astronomy |
| BuBIH | Bulletin Horaire du Bureau International de l'Heure | In French | → Serial publications, periodicals → 006 |
| BuMat | Bulletin Mathématique | In French | → Serial publications, periodicals → Mathematics |
| BV | Béton Vibré | In French | → Civil engineering → Civil engineering and land transport → Building |
| BV | Bassin Versant | In French | → Hydrology |
| BVP | Bureau de Vérification de la Publicité | In French | → 6591 |
| BVQI | Bureau Veritas Qualité Internationale | In French | → Quality management |
| C | Cystéine = C | Cysteine | In English = C | Cisteïna | In Catalan = C | Cystein | In Czech = C | Cystein | In German = C | Cisteína | In Spanish = C | Cisteino | In Esperanto = C | 시스테인 | In Korean = C | Sistein | In Indonesian = C | Cisteina | In Italian = C | ציסטאין | In Hebrew = C | Cisteīns | In Latvian = C | Cystein | In Letzeburgesh = C | Cisteinas | In Lithuanian = C | Cisztein | In Hungarian = C | Cysteïne | In Dutch = C | システイン | In Japanese = C | Cystein | In Norwegian = C | Cysteina | In Polish = C | Cisteína | In Portuguese = C | Цистеин | In Russian = C | Kysteiini | In Finnish = C | Cystein | In Swedish = C | Цистеїн | In Ukrainian = C | 半胱氨酸 | In Chinese |
In French | → Biochemistry, biophysics |
| C | Cytosine = C | Citosina | In Catalan = C | Cytosin | In Czech = C | Cytosin | In Danish = C | Cytosin | In German = C | Citosina | In Spanish = C | Citozino | In Esperanto = C | Cytosine | In English = C | Citosina | In Galician = C | Sitosin | In Indonesian = C | Citosina | In Italian = C | ציטוזין | In Hebrew = C | Citozinas | In Lithuanian = C | Cytosine | In Dutch = C | シトシン | In Japanese = C | Cytosin | In Norwegian = C | Cytozyna | In Polish = C | Citosina | In Portuguese = C | Цитозин | In Russian = C | Citozin | In Slovenian = C | Цитозин | In Serbian = C | Citozin | In Serbo-Croatian = C | Sytosiini | In Finnish = C | Cytosin | In Swedish = C | Cytosine | In Vietnamese = C | Sitozin | In Turkish = C | Цитозин | In Ukrainian = C | 胞嘧啶 | In Chinese |
In French | → Genetics → Biochemistry, biophysics |
| C | Carbone = C | Koolstof | In Afrikaans = C | كربون | In Arabic = C | Carbonu | In Asturian = C | Karbon | In Azerbaijani = C | Вуглярод | In Belarusian = C | Въглерод | In Bulgarian = C | কার্বন | In Bengali = C | Carboni | In Catalan = C | Carboniu | In Corsican = C | Uhlík | In Czech = C | Carbon | In Welsh = C | Carbon | In Danish = C | Kohlenstoff | In German = C | Άνθρακας | In Greek = C | Carbon | In English = C | Karbono | In Esperanto = C | Carbono | In Spanish = C | Süsinik | In Estonian = C | Karbono | In Basque = C | کربن | In Persian = C | Hiili | In Finnish = C | Carboni | In Friulian = C | Carbón | In Irish = C | Gualan | In Galician = C | Carbono | In Galician = C | કાર્બન | GU = C | פחמן | In Hebrew = C | कार्बन | In Hindi = C | Ugljik | In Croatian = C | Kabòn | HT = C | Szén | In Hungarian = C | Ածխածին | In Armenian = C | Carbon | In Interlingua = C | Karbon | In Indonesian = C | Karbo | In Ido = C | Kolefni | In Icelandic = C | Carbonio | In Italian = C | 炭素 | In Japanese = C | tabno | JBO = C | ಇಂಗಾಲ | KN = C | 탄소 | In Korean = C | Karbon | In Kurdish = C | Carbonium | In Latin = C | Kuelestoff | In Letzeburgesh = C | Koolstof | LI = C | Carbòni | In Lombard = C | Kaboni | In Lingala = C | Anglis | In Lithuanian = C | Ogleklis | In Latvian = C | Waro | In Māori = C | Јаглерод | In Macedonian = C | കാര്ബണ് | In Malayalam = C | Нүүрстөрөгч | In Mongolian = C | कार्बन | MR = C | Karbon | In Malay = C | Tecolli | En Nahuatl = C | Kohlenstoff | NDS = C | Koolstof | In Dutch = C | Karbon | In Nynorsk = C | Karbon | In Norwegian = C | Karbo | NOV = C | Carbòni | In Occitan = C | Węgiel | In Polish = C | Carbono | In Portuguese = C | K'illimsayaq | In Quechua = C | Carbon | In Romanian = C | Углерод | In Russian = C | Carbòniu | In Sicilian = C | Ugljenik | In Serbo-Croatian = C | Uhlík | In Slovak = C | Ogljik | In Slovenian = C | Karboni | SQ = C | Угљеник | In Serbian = C | Karbon | SU = C | Kol | In Swedish = C | Kaboni | In Swahili = C | கரிமம் | In Tamil = C | Карбон | In Tajik = C | คาร์บอน | In Thai = C | Karbon | In Tagalog = C | Karbon | In Turkish = C | Вуглець | In Ukrainian = C | Uglerod | In Uzbek = C | Cacbon | In Vietnamese = C | Carboun | VLS = C | Carbone | In Walloon = C | 碳 | WUU = C | קוילנשטאף | In Yiddisch = C | 碳 | In Chinese |
In French | → Chemistry |
| C&E | Ciel et Espace | In French | → Serial publications, periodicals → Astronomy → Earth sciences |
| C&T | Ciel et Terre | In French | → Serial publications, periodicals → Earth sciences |
| C2EI | Concours Européen de l'Entreprise Innovante | In French | → Economics |
| C3D | Caisse des Dépôts-Développements | In French | → Banks |
| C4F2 | Communication, Conduite du Changement, Culture Financière et Formation | In French | |
| C6R | Convention pour la 6ème République | In French | → Political parties and movements |
| CAAE | Certificat d'Aptitude à l'Administration des Entreprises | In French | → Management → Specialized or (poly)technical colleges |
| CAAF | Contrat d'Approvisionnement et d'Aménagement Forestier | In French | → Forestry |
| CAC | Compagnie des Agents de Change | In French | → Finance |
| CAC | Cotation Assistée en Continu | In French | → Finance |
| CAC | Comité Administratif de Coordination = CAC | Comité Administrativo de Coordinación | In Spanish = ACC | Administrative Committee on Coordination | In English = CAC | Comitê Administrativo de Coordenação | In Portuguese |
In French | → United Nations |
| CAC | Convention sur les Armes Chimiques = CAQ | Convención sobre las Armas Químicas | In Spanish = CWC | Chemical Weapons Convention | In English = CAQ | Convenção sobre Armas Químicas | In Portuguese |
In French | → International relations → Military engineering |
| CAC | Commission du Codex Alimentarius = CAC | Codex Alimentarius Commission | In English = CAC | Comisión del Codex Alimentarius | In Spanish = CAC | Comissão do Codex Alimentarius | In Portuguese |
In French | → Beverage industry → Food technology |
| CACAM | Caisse Algérienne de Crédit Agricole Mmutuel | In French | → Banks → Social welfare → Agricultural sciences |
| CACOM | Caisse de consolidation et de mobilisation des crédits à moyen terme | In French | → Banks |
| CADA | Commission d'Accès aux Documents Administratifs | In French | → Public administration, government |
| CADEP | Caisse d'Amortissement de la Dette Publique | In French | → Finance → Public administration, government |
| CADES | Caisse d'Amortissement de la Dette Sociale | In French | → Social sciences |
| CADIS | Centre d'Analyse et d'Intervention Sociologiques | In French | → Police |
| CADIST | Centre d'Acquisition et de Diffusion de l'Information Scientifique et Technique | In French | → Knowledge management → Libraries → Mathematics and natural sciences → Applied sciences, technology |
| CADTM | Comité pour l'Annulation de la Dette du Tiers-Monde | In French | → Organizations and associations → Economics |
| CAECL | Caisse d'Aide à l'Équipement des Collectivités Locales | In French | → Finance → Public administration, government |
| CAEI | Certificat d'aptitude à l'enseignement des enfants et adolescents inadaptés | In French | → Education |
| CAEM | Conseil d'Assistance Économique Mutuelle = СЭВ | Совет экономической взаимопомощи | In Russian = СИВ | Съвет за икономическа взаимопомощ | In Bulgarian = CAEM | Consell d'Assistència Econòmica Mútua | In Catalan = COMECON | Council of Mutual Economic Assistance | In English = 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 French | → International relations → Economics |
| CAF | Capacité d’autofinancement | In French | → Finance → Accounting |
| CAF | Caisse d’Allocations Familiales | In French | → Social welfare |
| CAF | Caisse d'Allocations Familiales | In French | → Social welfare |
| CAFE | Calcul Formel et Équations | In French | → Mathematics |
| CAFETS | Certificat d'Aptitude aux Fonctions d'Éducateur Technique Spécialisé | In French | → Education |
| CAFOC | Centre Académique de Formation Continue | In French | → Education |
| CAFOE | Circulaire de l'Association Francaise d'Observateurs d'Étoiles Variables | In French | → Serial publications, periodicals → Astronomy |
| CAFRP | Caisse d'Allocations Familiales de la Région Parisienne | In French | → Social welfare |
| CAH | Centrale d'Approvisionnement pour l'Habitat | In French | → Accommodation |
| CAINAGOD | Caisse Nationale de Garantie des Ouvriers-Dockers | In French | → Insurance |
| CAJ | Centre d'Animation Jeunesse | In French | |
| CAJV | Centre Aviaire Johanne Vaillancourt | In French | → Zoology |
| CAL | Commission d'Attribution des Logements | In French | → Accommodation |
| CALA | Club d'Astronomie de Lyon Ampère | In French | → Organizations and associations → Astronomy |
| CALA | Club d'Astronomie de Lyon Ampère | In French | → Organizations and associations → Astronomy |
| CALIPSO | Comptabilité Axée sur la LIsibilité de Processus et la Simplification des Organisations | In French | → Accounting |
| CALMIT | Center for Advanced Land Management Information Technologies | In French | → Computer science → Agricultural sciences |
| CALT | Contrat d’Approvisionnement Long Terme | In French | → Commercial law |
| CAM | Carte à Mémoire | In French | → Memories |
| CAMAC | Caisse Mutuelle d'Assurance Maladie des Cultes | In French | → Religion, theology → Insurance |
| CAMARCA | Caisse Mutuelle Autonome de Retraites Complémentaires Agricoles | In French | → Labour, labour economics → Insurance → Agricultural sciences |
| CAMARI | Certificat d’Aptitude à Manipuler les Appareils de Radiographie Industrielle | In French | → Medicine → 620039 |
| CAMAVIC | Caisse Mutuelle d'Assurance Vieillesse des Cultes | In French | → Religion, theology → Insurance |
| CAMCA | Centre d'Arbitrage et de Médiation Commerciale pour les Amériques = CAMCA | Centro de Arbitraje y Mediación Comercial para las Américas | In Spanish = CAMCA | Commercial Arbitration and Mediation Centre for the Americas | In English = CAMCA | Centro de Arbitragem e Mediação Comercial para as Américas | In Portuguese |
In French | → Civil law → Trade |
| CAMEF | Conseil Atlantique des Ministres de l’Éducation et de la Formation (http://camet-camef.ca) = CAMET | Council of Atlantic Ministers of Education and Training | In English |
In French | → Organizations and associations → Education |
| CAMELIA | CAlcul MÉcanique de LIgnes Aériennes | In French | → Electrical engineering |
| CAMIF | Coopérative d'Achat Mutualiste des Instituteurs de France | In French | |
| CAMR | Caisse Autonome Mutuelle de Retraites | In French | → Labour, labour economics → Insurance |
| CAMR | Caisse Autonome Mutuelle de Retraite | In French | → Insurance → Labour, labour economics |
| CAMS | Certificat d'Aptitude en Médecine du Sport | In French | → Education → Medicine → Sport, physical exercises |
| CAMV | Coût d’Achat des Marchandises Vendues | In French | → Prices |
| CAMV | Club Athlétique de Mantes la ville | In French | → Organizations and associations → Sport, physical exercises |
| CAN | Compagnie Auxiliaire de Navigation | In French | → Transport and postal services |
| CAN | Communauté Andine des Nations | In French | → International relations |
| CANAM | Caisse Nationale d'Assurance Maladie et Maternité | In French | → Insurance |
| CANCAVA | Caisse Nationale de Compensation de l'Assurance Vieillesse des Artisans | In French | → Insurance |
| CANSSM | Caisse Autonome Nationale de la Sécurité Sociale dans les Mines | In French | → Insurance → Mining |
| CAO | Conception Assistée par Ordinateur | In French | → Computer-based techniques → Engineering, technology |
| CAP | Centre d'Analyse et de Prévision | In French | |
| CAP | Certificat d'Aptitude Professionnelle | In French | → Labour, labour economics → Education |
| CAPE | Coordonnateur des Améliorations des Processus d’Entreprise | In French | → Management |
| CAPEB | Confédération de l'Artisanat et des Petites Entreprises du Bâtiment (www.capeb.fr) | In French | → Organizations and associations → Building |
| CAPES | Certificat d'Aptitude au Professorat de l'Enseignement Secondaire | In French | → Education |
| CAPESA | Certificat d'Aptitude pour l'Enseignement Secondaire Agricole | In French | → Education → Agricultural sciences |
| CAPET | Certificat d'Aptitude au Professorat de l'Enseignement Technique | In French | → Education → Engineering, technology |
| CAPLPA | Certificat d'Aptitude au Professorat des Lycées Professionnels Agricoles | In French | → Labour, labour economics → Education → Agricultural sciences |
| CAPO | Club Athlétique Préparation Olympique | In French | → Organizations and associations → Sport, physical exercises |
| CAPRIM | Caisse de Prêts Immobiliers de Paris et des départements limitrophes | In French | → Banks → Accommodation |
| CAPS | Communauté d'Agglomération du Plateau de Saclay (www.saclay-scientipole.org) | In French | → 351 |
| CAPS | Compilation, Architectures Parallèles et Systèmes | In French | → Research institutes → Computer science |
| CARE | Centre d'Anthropologie Religieuse Européenne (http://care.ehess.fr) | In French | → Research institutes → Religion, theology → Anthropology |
| CARIF | Centre d'Animation, de Ressources et d'Information sur les Formations | In French | → Libraries → Education |
| CARIMET | Coopération Caribéenne de Métrologie = CARIMET | Caribbean Metrology Cooperation | In English = CARIMET | Cooperação Caribenha de Metrologia | In Portuguese |
In French | → International relations → Standardization |
| CARMF | Caisse Autonome de Retraite des Médecins Francais | In French | → Labour, labour economics → Insurance → Medicine |
| CARPA | Caisse de Règlements Pécuniaires de la Profession d'Avocat | In French | → Labour, labour economics → Law, jurisprudence |
| CARPIMKO | Caisse Autonome de Retraite et de Prévoyance des Infirmiers, Masseurs-Kinésithérapeutes, médecins-podologues, orthophonistes et orthoptistes | In French | → Labour, labour economics → Insurance → Medicine |
| CARUM | Club des Anesthésistes Réanimateurs Urgentistes Militaires | In French | → Organizations and associations → Anesthesiology |
| CAS | Comité d'Action Socialiste | In French | → Political parties and movements → History |
| CAS | Caisse d’Activités Sociales | In French | → Social welfare |
| CAS | Centre d'Analyse Stratégique | In French | |
| CASIMIR | Centre d'Appui et Simulation des Industries par les Moyens de l'Innovation et de la Recherche | In French | → Research policy → Engineering, technology |
| CASM | Centre d'Action Sociale des Métiers | In French | → Labour, labour economics → Social welfare |
| CAT | Centre d'Aide par le Travail | In French | → Labour, labour economics |
| CATIA | Conception Assistée Tri-dimensionnelle InterActive | In French | → Computer-based techniques → Engineering, technology |
| CATP | Certificat d’Aptitude Technique et Professionnelle | In French | → Education |
| CATPR | Contrat d’Auxiliaire Temporaire du secteur PRivé | In French | → Labour, labour economics |
| CATPU | Contrat d’Auxiliaire Temporaire du secteur PUblic | In French | → Labour, labour economics |
| CAUE | Conseil d'Architecture, d'Urbanisme et d'Environnement | In French | → Nature → Regional planning → Architecture |
| CAUE | Conseil d'Architecture, d'Urbanisme et de l'Environnement | In French | → Regional planning → Architecture |
| CAUE | Conseil en Architecture, Urbanisme et Environnement | In French | → Environment, environmental sciences → Architecture |
| CAVAMAC | Caisse d'Allocation Vieillesse des Agents généraux et des Mandataires non salariés d'Assurance et de Capitalisation | In French | → Labour, labour economics → Insurance |
| CAVEC | Caisse d'Assurance Vieillesse des Experts-Comptables | In French | → Labour, labour economics → Insurance → Accounting |
| CAVOM | Caisse d'Allocation Vieillesse des Officiers Ministériels | In French | → Labour, labour economics → Central administration → Insurance |
| CAVP | Caisse d'Assurance Vieillesse des Pharmaciens | In French | → Labour, labour economics → Insurance → Pharmacology, toxicology |
| CBEMM | Compteur Bleu Électronique Monophasé Multitarif | In French | → Electrical engineering |
| CBL-G | Cercle Bernard Lazare - Grenoble | In French | → Organizations and associations |
| CBU | Contrôle Bibliographique Universel | In French | → Bibliography → Libraries |
| CCAG | Cahier des Clauses Administratives Générales | In French | → Public administration, government |
| CCAP | Cahier des Clauses Administratives Particulières | In French | → Public administration, government |
| CCAS | Centre Communal d'Action Sociale | In French | → Social welfare |
| CCATP | Cahier des Clauses Administratives et Techniques Particulières | In French | → Public administration, government |
| CCbdx | Collectif des Câblés de Bordeaux | In French | → Networks, communication → Organizations and associations |
| CCCE | Caisse Centrale de Coopération Économique | In French | → International relations → Economics |
| CCCI | Conseil Canadien pour la Coopération Internationale (www.ccic.ca) = CCCI | Consejo Canadiense de Cooperación Internacional | In Spanish = CCIC | Canadian Council for International Cooperation | In English = CCCI | Conselho Canadense para Cooperação Internacional | In Portuguese |
In French | → Organizations and associations → International relations |
| CCCPA | Convention Collective de la Communication et de la Production Audiovisuelles | In French | → Labour, labour economics → Telecommunications → 659 |
| CCCPA | Consortium des Collèges Communautaires des Provinces de l’Atlantique | In French | → Organizations and associations |
| CCDE | Comité Consultatif de Déontologie et d'Éthique | In French | → Organizations and associations → Ethics |
| CCE | Conseil Confort Electricité | In French | → Electrical engineering |
| CCEC | Commission Consultative de l'Évaluation des Charges | In French | |
| CCF | Crédit Commercial de France | In French | → Banks |
| CCFA | Comité des Constructeurs Français d'Automobiles | In French | → Organizations and associations → Automobile manufacturing |
| CCFC | Congé Charbonnier de Fin de Carrière | In French | → Labour, labour economics → Mining |
| CCFE | Communauté des Chemins de Fer Européens | In French | → Organizations and associations → Transport and postal services |
| CCFR | Catalogue Collectif de France | In French | → Bibliography → Libraries |
| CCH | Code de la Construction et de l'Habitation | In French | → Civil engineering → Building |
| CCI | Corps Commun d'Inspection = JIU | Joint Inspection Unit | In English |
In French | |
| CCI | Chambre de Commerce Internationale (www.iccwbo.org) = ICC | International Chamber of Commerce | In English = CCI | Cámara de Comercio Internacional | In Spanish = CCI | Câmara de Comércio Internacional | In Portuguese |
In French | → Organizations and associations → Trade |
| CCI-T | Comité Communiste Internationaliste-Trotskyste | In French | → Political parties and movements |
| CCIERBC | Comité Consultatif INRETS d'Éthique sur la Recherche Biomédicale et Comportementale | In French | → Organizations and associations → Ethics → Medicine → Transport and postal services |
| CCIFE | Chambre de Commerce et d'Industrie Française à l'Étranger | In French | → Organizations and associations → Industry, industrial policy → Trade |
| CCIP | Chambre de Commerce et d’Industrie de Paris | In French | → Economics |
| CCIS | Conférence Canadienne des Instituts Séculiers = CCSI | Canadian Conference of Secular Institutes | In English |
In French | → Christianity |
| CCITT | Comité Consultatif International pour le Téléphone et le Télégraphe | In French | → Telecommunications |
| CCL | Confédération du Commerce luxembourgeois | In French | → Organizations and associations → Trade |
| CCLAT | Centre Canadien de Lutte contre l'Alcoolisme et les Toxicomanies (www.ccsa.ca) = CCSA | Canadian Centre on Substance Abuse | In English |
In French | → Medicine |
| CCM | Compagnie Corse Méditerranée | In French | → Transport and postal services |
| CCM | Chromatographie sur Couche Mince | In French | → Chromatography, mass spectrography |
| CCM | Centre Cinématographique Marocain (www.ccm.ma) | In French | → Cinema, movies |
| CCM | Comment Ça Marche (www.commentcamarche.net) | In French | → Networks, communication → Computer science |
| CCM | Centre Culturel Médical | In French | → Medicine |
| CCM | Certificat de Capacité Manuelle | In French | → Education |
| CCMH | Concentration Corpusculaire Moyenne en Hémoglobine = MCHC | Mean Corpuscular Hemoglobin Concentration | In English |
In French | → Blood and circulatory system |
| CCMSA | Caisse Centrale de Mutualité Sociale Agricole | In French | → Insurance → Agricultural sciences |
| CCNI | Comité Consultatif National de l’Immunisation | In French | → Organizations and associations → Immunology and allergy → Pharmacology, toxicology |
| CCNR | Centre de Consultation sur les Nouvelles Religions | In French | → Modern spiritual movements → Social sciences |
| CCNUCC | Convention-Cadre des Nations Unies sur les Changements Climatiques (http://unfccc.int) = UNFCCC | United Nations Framework Convention on Climate Change | In English = CMNUCC | Convenio Marco de las Naciones Unidas sobre Cambio Climático | In Spanish = 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 French | → United Nations → Meteorology, climatology |
| CCOC | Coopérative des Céréales de l'Ouest Constantinois | In French | → Agricultural sciences |
| CCOS | Conseil Central des Oeuvres Sociales | In French | → Social welfare |
| CCP | Compte Chèque Postal | In French | → Banks |
| CCPA | Conseils et Compétences en Productions Animales | In French | → Agricultural sciences |
| CCPA | Communauté de Communes du Pays de l'Arbresle | In French | → Municipal administration |
| CCPA | Conseil Canadien de Protection des Animaux | In French | → Organizations and associations → Nature and society |
| CCPA | Communauté de Communes de Plabennec et des Abers | In French | → Municipal administration |
| CCPI | Commission de Confiscation des Profits | In French | |
| CCPM | Comité Central des Pêches Maritimes | In French | → Organizations and associations → Fishing, hunting |
| CCPMA | Caisse Centrale de Prévoyance Mutuelle Agricole | In French | → Insurance → Agricultural sciences |
| CCQ | Centre de Conservation du Québec (www.ccq.mcc.gouv.qc.ca) | In French | → Museums |
| CCQ | Commission de la Construction du Québec (www.ccq.org) | In French | → Organizations and associations → Building |
| CCR | Commission Centrale pour la Navigation du Rhin = CCR | Centrale Commissie voor de Rijnvaart | In Dutch = CCR | Central Commission for Navigation on the Rhine | In English = ZKR | Zentralkommission für die Rheinschifffahrt | In German |
In French | → Transport and postal services |
| CCR | Caisse Centrale de Réassurance | In French | → Insurance |