| CFDT | Confédération Française des Travailleurs | In French | → Organizations and associations → Labour, labour economics |
| CFDT | Confédération Française Démocratique du Travail (www.cfdt.fr) | In French | → Organizations and associations → Labour, labour economics |
| CFE | Commission Fédérale des Étrangers | In French | → Organizations and associations → Migrations |
| CFE | Conseil de la Famille et de l'Enfance | In French | → Organizations and associations → Social welfare |
| CFE | Comisión Federal de Electricidad | In Spanish | → Organizations and associations → Central administration → Electrical engineering |
| CFE-CGC | Confédération Française de l'Encadrement - Confédération Générale des Cadres | In French | → Management → Labour, labour economics |
| CFEP | Chambre des Fonctionnaires et Employés Publics | In French | → Organizations and associations → Labour, labour economics → Public administration, government |
| CFG | Context Free Grammar | In English | → Data → Document processing |
| CFH | Conference on Faith and History | In English | → Organizations and associations → Religion, theology → History |
| CFI | Center for Inquiry | In English | → Organizations and associations → Philosophy, psychology |
| CFML | ColdFusion Markup Language | In English | → Programming languages |
| CFN | Conselho Federal de Nutricionistas | In Portuguese | → Organizations and associations → Nutrition |
| CFPB | Consortium Français de Participations Bancaires | In French | → Organizations and associations → 33677 |
| CFPJ | Centre de Formation et de Perfectionnement des Journalistes | In French | → Labour, labour economics → Specialized or (poly)technical colleges → Newspapers, journalism |
| CFQ | Confédération Française de la Quincaillerie | In French | → Organizations and associations → Trade |
| CFR | Colegiul Farmacistilor din România | In Romanian | → Organizations and associations → Pharmacology, toxicology |
| CFTC | Confédération Française des Travailleurs Chrétiens | In French | → Organizations and associations → Labour, labour economics → Christianity |
| CFZ | Centrum Flagi Ziemi | In Polish | → Organizations and associations → 9299 |
| CG | Computers and Geosciences | In English | → Serial publications, periodicals → Computer science → Earth sciences |
| CGA | Confédération Générale de l’Agriculture | In French | → Organizations and associations → Agricultural sciences → History |
| CGB | Christlicher Gewerkschaftsbund | In German | → Organizations and associations → Christianity → Labour, labour economics |
| CGC | Confédération Générale des Cadres | In French | → Organizations and associations → Labour, labour economics |
| CGCEH | Conference Group for Central European History | In English | → Organizations and associations → History → Area studies |
| CGDAM | Conformal Geometry and Dynamics of the American Mathematical Society | In English | → Serial publications, periodicals → Mathematics |
| CGDI | Consejo General de los colegios oficiales de Decoradores Diseñadores de Interior | In Spanish | → Organizations and associations → Architecture |
| CGE | Conférence des Grandes Écoles | In French | → Organizations and associations → Specialized or (poly)technical colleges |
| CGH | Computergeneriertes Hologramm | In German | → Graphical processing → Optics |
| CGI | Computer Generated Imagery | In English | → Image processing |
| CGI | Common Gateway Interface | In English | → Software → Networks, communication |
| CGIAR | Consultative Group on International Agricultural Research | In English | → Organizations and associations → Agricultural sciences |
| CGIH | Comité de Gestion de l'Informatique Hospitalière | In French | → Computer science → Medicine |
| CGIP | Computer Graphics Image Processing | In English | → Serial publications, periodicals → Computer science |
| CGM | Computer Graphics Metafile | In English | → Data → Graphical processing → Image processing |
| CGMP | Cisco Group Management Protocol | In English | → Networks, communication |
| CGMP | Centre Généalogique du Midi-Provence (www.cgmp-provence.org) | In French | → Organizations and associations → Genealogy |
| CGMP | Cercle Généalogique de Maine et Perche | In French | → Organizations and associations → Genealogy |
| CGPM | Conférence Générale des Poids et Mesures | In French | → Standardization |
| CGPME | Confédération Générale des Petites et Moyennes Entreprises | In French | → Organizations and associations → Labour, labour economics |
| CGPT | Confédération Générale des Travailleurs Paysans | In French | → Organizations and associations → Labour, labour economics → Agricultural sciences |
| CGRA | Commission de Gestion de la Recherche et de ses Applications | In French | → Research policy |
| CGS | Cinecircoli Giovanili Socioculturali | In Italian | → Organizations and associations |
| CGSAH | Conference Group for Social and Administrative History | In English | → Organizations and associations → Sociology → Public administration, government → History |
| CGSLB | Centrale Générale des Syndicats Libéraux de Belgique = ACLVB | Algemene Centrale der Liberale Vakbonden | In Dutch |
In French | → Organizations and associations → Labour, labour economics |
| CGT | Confédération Générale du Travail | In French | → Organizations and associations → Labour, labour economics |
| CGT | Confédération Générale des Travailleurs | In French | → Organizations and associations → Labour, labour economics |
| CGT-FO | Confédération Générale des Travailleurs - Force Ouvrière | In French | → Organizations and associations → Labour, labour economics |
| CGT-FO | Confédération Générale du Travail-Force Ouvrière | In French | → Organizations and associations → Labour, labour economics |
| CGTI | Conseil Général des Technologies de l'Information | In French | → Computer science → Telecommunications |
| CGTL | Confédération Générale du Travail Luxembourgeoise | In French | → Organizations and associations → Labour, labour economics |
| CGTL | Confédération Générale des Travailleurs du Liban | In French | → Organizations and associations → Labour, labour economics |
| CGTP | Confederação Geral dos Trabalhadores Portugueses | In Portuguese | → Organizations and associations → Labour, labour economics |
| CGTU | Confédération Générale du Travail Unitaire | In French | → Organizations and associations → Labour, labour economics → History |
| CHA | Canadian Hockey Association | In English | → Associations → Sport, physical exercises |
| CHA | Catholic Health Association | In English | → Associations → Roman catholic church → Medicine |
| CHA | Caribbean Hotel Association | In English | → Associations → Tourism |
| CHA | Craft and Hobby Association | In English | → Associations |
| CHA | Certified Horsemanship Association | In English | → Associations → Sport, physical exercises |
| CHA | Canadian Historical Association = SHC | Société Historique du Canada | In French |
In English | → Associations → History |
| ChA&A | Chinese Astronomy and Astrophysics | In English | → Serial publications, periodicals → Astronomy |
| CHAR | Centre d’Histoire de l’Art de la Renaissance | In French | → Research institutes → History |
| CHARMS | Canadian Hemophilia Assessment and Resource Management Information System | In English | → Knowledge management → Blood and circulatory system → Pathology |
| CHARTH | Compagnie Holding d'Applications et de Réalisations Thermiques et Hydrauliques | In French | → Organizations and associations → Energy economics → Mechanical engineering |
| CHAVI | Center for HIV-AIDS Vaccine Immunology | In English | → Research institutes → Immunology and allergy → Infectious diseases |
| CHC | Czechoslovak History Conference | In English | → Organizations and associations → History |
| ChCom | Chemical Communications | In English | → Serial publications, periodicals → Chemistry |
| ChEdu | Chemical Educator | In English | → Serial publications, periodicals → Chemistry |
| ChEnC | Chemical Engineering Communications | In English | → Serial publications, periodicals → Chemistry → Chemical technology |
| ChEnN | Chemical Engineering News | In English | → Serial publications, periodicals → Chemistry → Chemical technology |
| ChEnS | Chemical Engineering Science | In English | → Serial publications, periodicals → Chemistry → Chemical technology |
| ChGeo | Chemical Geology | In English | → Serial publications, periodicals → Earth sciences |
| CHHS | Charles Homer Haskins Society | In English | → Organizations and associations → History |
| CHI | Computer-to-Human Interface | In English | → Human-computer interaction |
| CHI | Computer-Human Interaction = MDI | Människa-datorinteraktion | In Swedish = MMI | Man-Machine Interaction | In English = IHM | Interface Homme-Machine | In French |
In English | → Human-computer interaction |
| ChIEJ | Chinese Institute of Engineers Journal | In English | → Serial publications, periodicals → Engineering, technology |
| CHIP | Children's Hospital Informatics Program | In English | → Software → Pediatry |
| CHIR | Chirurgie, Informatique et Robotique | In French | → Computer science → Surgery, orthopaedics, ophthalmology → Mechanical engineering → Electronics |
| CHJ | Conference of Historical Journals | In English | → Serial publications, periodicals → Organizations and associations → History |
| ChJA | Chinese Journal of Aeronautics | In English | → Serial publications, periodicals → Spaceflight engineering, astronautics → Aeronautics, aircraft |
| ChJAA | Chinese Journal of Astronomy and Astrophysics | In English | → Serial publications, periodicals → Spaceflight engineering, astronautics → Astronomy |
| ChJCP | Chinese Journal of Chemical Physics | In English | → Serial publications, periodicals → Physics → Chemistry |
| ChJG | Chinese Journal of Geophysics | In English | → Serial publications, periodicals → Geophysics |
| ChJIR | Chinese Journal of Infrared Research | In English | → Serial publications, periodicals → Optics |
| ChJL | Chinese Journal of Lasers | In English | → Serial publications, periodicals → Optics |
| ChJNP | Chinese Journal of Nuclear Physics | In English | → Serial publications, periodicals → Nuclear, atomic, and molecular physics |
| ChJPh | Chinese Journal of Physics | In English | → Serial publications, periodicals → Physics |
| ChJPR | Chinese Journal of Polar Research | In English | → Serial publications, periodicals → Earth sciences |
| ChJS | Chinese Journal of Semiconductors | In English | → Serial publications, periodicals → Physics |
| ChJSS | Chinese Journal of Space Science | In English | → Serial publications, periodicals → Astronomy → Spaceflight engineering, astronautics |
| CHL | Certified Hardware List | In English | → Software |
| CHLA | Canadian Health Libraries Association = ABSC | Association des Bibliothèques de la Santé du Canada | In French |
In English | → Libraries → Associations → Medicine |
| CHMAC | Coopération Homme-Machine pour l'Assistance à la conduite | In French | → Human-computer interaction → Vehicle engineering → Transport and postal services |
| CHNM | Center for History and New Media | In English | → Newspapers, journalism → History |
| ChPh | Chemical Physics | In English | → Serial publications, periodicals → Chemistry → Physics |
| ChPhL | Chinese Physics Letter | In English | → Serial publications, periodicals → Physics |
| ChPhy | Chinese Physics | In English | → Serial publications, periodicals → Physics |
| CHRC | Cito - Harten Rijn Combinatie | In Dutch | → Organizations and associations → Sport, physical exercises |
| ChSAJ | Chinese Society of Astronautics Journal | In English | → Serial publications, periodicals → Astronomy → Spaceflight engineering, astronautics |
| ChSBu | Chinese Science Bulletin | In English | → Serial publications, periodicals → Mathematics and natural sciences |
| ChSMJ | Chinese Society of Mechanical Engineers Journal | In English | → Serial publications, periodicals → Mechanical engineering |
| ChSRv | Chemical Society Reviews | In English | → Serial publications, periodicals → Chemistry |
| ChSST | Chinese Space Science Technology | In English | → Serial publications, periodicals → Astronomy → Spaceflight engineering, astronautics |
| CHT | Catalog of Hittite Texts = CTH | Catalogue des Textes Hittites | In French |
In English | → Bibliography → Libraries → Language, linguistics, literature |
| CHTML | Compact HyperText Markup Language | In English | → Programming languages → Telecommunications |
| CHUS | Chinese Historians in the United States | In English | → Organizations and associations → History |
| CIA | Controller Interface Assembly | In English | → Human-computer interaction |
| CIA | Control Interface Assembly | In English | → Human-computer interaction |
| CIB | Control Interface Block | In English | → Human-computer interaction |
| CiBAA | Circular of the British Astronomical Association | In English | → Serial publications, periodicals → Astronomy |
| CIBT | Conseil International des Bois Tropicaux | In French | → Organizations and associations → Timber and woodworking industry |
| CIC | Command Interface Control | In English | → Human-computer interaction |
| CIC | Centre d'Investigations Cliniques | In French | → Organizations and associations → Pharmacology, toxicology |
| CIC | Centro Internazionale Crocevia | In Italian | → Organizations and associations |
| CIC | Centro Internacional de Computação (www.unicc.org) = CICE | Centro Internacional de Cálculos Electrónicos | In Spanish = ICC | International Computing Centre | In English = CIC | Centre International de Calcul | In French |
In Portuguese | → Computer science → United Nations |
| CIC | Centre International de Calcul (www.unicc.org) = CICE, ICC (look above) |
In French | → Computer science → United Nations |
| CICAE | Confédération Internationale des Cinémas d'Art et d'Essai (www.art-et-essai.org/cicae/) | In French | → Organizations and associations → Cinema, movies |
| CICE | Centro Internacional de Cálculos Electrónicos (www.unicc.org) = CIC, ICC (look above) |
In Spanish | → Computer science → United Nations |
| CICESE | Centro de Investigación Científica y de Educación Superior de Ensenada (www.cicese.mx) | In Spanish | → Research institutes → Research policy → Higher education, universities |
| CICF | Chambre des Ingénieurs-Conseil de France | In French | → Organizations and associations → Engineering, technology |
| CICF | Confédération des Industries Céramiques de France | In French | → Organizations and associations → 666 |
| CICI | Commission Internationale de Coopération Intellectuelle | In French | → Organizations and associations → International relations |
| CICLIM | Coordination Internationale des Chercheurs sur les Littératures du Maghreb | In French | → Organizations and associations → Literature |
| CICP | Cambodian Institute for Cooperation and Peace (www.cicp.org.kh) | In English | → Research institutes → Democracy → Internal policy → International relations |
| CICR | Comité International de la Croix-Rouge (www.icrc.org) = CICR | Comité Internacional de la Cruz Roja | In Spanish = ICRC | International Committee of the Red Cross | In English = CICV | Comitê Internacional da Cruz Vermelha | In Portuguese = МККК | Международный комитет Красного Креста | In Russian = SSKK | Starptautiskā Sarkanā Krusta Komiteja | In Latvian = CICR | Comitato Internazionale della Croce Rossa | In Italian = ICRC | 적십자 국제 위원회 | In Korean = CICR | Comitè Internacional de la Creu Roja | In Catalan = CICR | Comitât entèrnacionâl de la Crouèx-Roge | FRP |
In French | → Organizations and associations → Medicine |
| CICR | Comitè Internacional de la Creu Roja (www.icrc.org) = ICRC, CICV, МККК, SSKK (look above) |
In Catalan | → Organizations and associations → Medicine |
| CICR | Comitato Internazionale della Croce Rossa (www.icrc.org) = ICRC, CICV, МККК, SSKK (look above) |
In Italian | → Organizations and associations → Medicine |
| CICR | Comité Internacional de la Cruz Roja (www.icrc.org) = ICRC, CICV, МККК, SSKK (look above) |
In Spanish | → Organizations and associations → Medicine |
| CICR | Comitât entèrnacionâl de la Crouèx-Roge (www.icrc.org) = ICRC, CICV, МККК, SSKK (look above) |
[FRP] | → Organizations and associations → Medicine |
| CICTE | Comitê Interamericano de Combate ao Terrorismo = CICTE | Comisión Interamericana contra el Terrorismo | In Spanish |
In Portuguese | → Organizations and associations → Polemology |
| CICTE | Comisión Interamericana contra el Terrorismo = (look above) |
In Spanish | → Organizations and associations → Polemology |
| CICU | Computer Interface Conditioning Unit | In English | → Human-computer interaction |
| CICV | Comitê Internacional da Cruz Vermelha (www.icrc.org) = CICR, ICRC, МККК, SSKK (look above) |
In Portuguese | → Organizations and associations → Medicine |
| CID | Computer Interface Device | In English | → Human-computer interaction |
| CID | Centre d'Information et de Documentation | In French | → Libraries |
| CIDA | Confederazione Italiana Dirigenti d'Azienda | In Italian | → Organizations and associations → Labour, labour economics |
| CIDB | Centre d'Information et de Documentation sur le Bruit | In French | → 002 |
| CIDEC | Centro Interdisciplinario de Estudios Culturales | In Spanish | → Research institutes → Civilization, culture, progress |
| CIDI | Conselho Interamericano para o Desenvolvimento Integral = CIDI | Consejo Interamericano para el Desarrollo Integral | In Spanish = CIDI | Conseil interaméricain pour le Développement Intégré | In French |
In Portuguese | → Organizations and associations → International relations → Development |
| CIDI | Consejo Interamericano para el Desarrollo Integral = (look above) |
In Spanish | → Organizations and associations → International relations → Development |
| CIDI | Conseil interaméricain pour le Développement Intégré = (look above) |
In French | → Organizations and associations → International relations → Development |
| CIDIS | Centro di Informazione, Documentazione e Iniziativa per lo Sviluppo | In Italian | → Organizations and associations → Libraries → Development |
| CIDJ | Centre d'Information et de Documentation pour la Jeunesse | In French | → Libraries |
| CIDPDD | Centre International des Droits de la Personne et du Développement Démocratique (www.ichrdd.ca) = ICHRDD | International Centre for Human Rights and Democratic Development | In English |
In French | → Organizations and associations → Fundamental rights → Democracy |
| CIDS | Comisión Interamericana de Desarrollo Sostenible = CIDS | Commission Interaméricaine pour le Développement Durable | In French = CIDS | Comissão Interamericana de Desenvolvimento Sustentável | In Portuguese |
In Spanish | → Organizations and associations → International relations → Development |
| CIDS | Comissão Interamericana de Desenvolvimento Sustentável = (look above) |
In Portuguese | → Organizations and associations → International relations → Development |
| CIDS | Commission Interaméricaine pour le Développement Durable = (look above) |
In French | → Organizations and associations → International relations → Development |
| CIDT | Centre de développement des technologies de l’information | In French | → Computer science → Telecommunications |
| CIDUNATI | Confédération Intersyndicale de Défense et d'Union Nationale des Travailleurs Indépendants | In French | → Organizations and associations → Labour, labour economics |
| CIDUS | Centre d'Information et de Documentation Universitaire et Scientifique | In French | → Libraries → Higher education, universities → Mathematics and natural sciences |
| CIE | Conférence Islamique Européenne | In French | → Organizations and associations → Islam |
| CIE | Communications Interface Equipment | In English | → Human-computer interaction → Telecommunications |
| CIECC | Consejo Interamericano para la Educación, la Ciencia y la Cultura | In Spanish | → International relations → Education → Mathematics and natural sciences → Civilization, culture, progress |
| CIES | Centro Informazione ed Educazione allo Sviluppo | In Italian | → Organizations and associations → Education → Development |
| CIESIN | Center for International Earth Science Information Network | In English | → Research institutes → Earth sciences |
| CIESM | Commission Internationale pour l'Exploration Scientifique de la mer Méditerranée | In French | → Organizations and associations → Marine research, oceanography |
| CIESS | Centro Interamericano de Estudos sobre Segurança Social = CIESS | Centro Interamericano de Estudios de Seguridad Social | In Spanish |
In Portuguese | → Organizations and associations → Insurance |
| CIESS | Centro Interamericano de Estudios de Seguridad Social = (look above) |
In Spanish | → Organizations and associations → Insurance |
| CIF | Commission Interaméricaine des Femmes (www.oas.org/cim/) = CIM | Comisión Interamericana de Mujeres | In English = IACW | Inter-American Commission of Women | In English = CIM | Comissão Interamericana de Mulheres | In Portuguese |
In French | → Organizations and associations → Feminism |
| CIFA | Committee for Inland Fisheries of Africa | In English | → Organizations and associations → Fishing, hunting |
| CIFRE | Convention Industrielle de Formation par la Recherche | In French | → Research policy → Education |
| CIG | Confederación Intersindical Galega | In Spanish | → Organizations and associations → Labour, labour economics |
| CIG | Communications and Interface Group | In English | → Human-computer interaction → Telecommunications |
| CIGOS | Canadian Interest Group on Open Systems | In English | → Organizations and associations → Computer science |
| CIGRE | Conférence Internationale des Grands Réseaux Électriques à haute tension | In French | → Organizations and associations → Electrical engineering |
| CIGREF | Club Informatique des Grandes Entreprises Françaises | In French | → Computer science → Organizations and associations |
| CIHAM | Centre Interuniversitaire d'Histoire et d'Archéologie Médiévales | In French | → Research institutes → Archeology → History |
| CIHEAM | Centre International des Hautes Études Agronomiques Méditerranéennes (www.ciheam.org) | In French | → Research institutes → Agricultural sciences |
| CIHEF | Commission Internationale Humanitaire d'Établisssement des Faits (www.ihffc.org) = IHFCC | International Humanitarian Fact-Finding Commission | In English |
In French | → Organizations and associations → International law |
| CIHR | Canadian Institutes of Health Research (www.cihr.ca) = IRSC | Instituts de recherche en santé du Canada | In French |
In English | → Research institutes → Biological sciences → Medicine |
| CIIBA | Comité Interministériel de l'Informatique et de la Bureautique dans l'Administration | In French | → Computer science → Central administration |
| CIID | Commission Internationale pour les Irrigations et le Drainage = ICID | International Commission for Irrigation and Drainage | In English |
In French | → Organizations and associations → 627 → Agricultural sciences |
| CIINB | Commission Interministérielle des Installations Nucléaires de Base | In French | → Organizations and associations → Central administration → Nuclear technology |
| CIJEF | Conseil International des organisations de Jeunes de la Francophonie | In French | → Organizations and associations |
| CIJV | Centre International Jules-Verne (www.cijv.fr) | In French | → Museums → Literature |
| CIKTN | Chemistry Innovation Knowledge Transfer Network | In English | → Organizations and associations → Chemistry |
| CIL | Concours Informatique Luxembourgeois | In French | → Computer science |
| CILT | Center for Information on Language Teaching and Research (www.cilt.org.uk) | In English | → Organizations and associations → Education → Language, linguistics, literature |
| CIM | Comisión Interamericana de Mujeres (www.oas.org/cim/) = CIF, IACW (look above) |
In English | → Organizations and associations → Feminism |
| CIM | Comissão Interamericana de Mulheres (www.convenioandresbello.org) = CIF, IACW (look above) |
In Portuguese | → Organizations and associations → Feminism |
| CIM | Computer-Integrated Manufacturing | In English | → Hardware → Electronics |
| CIM | Computer Input Multiplexer | In English | → Computer science |
| CIMAC | Conseil International des Machines à Combustion | In French | → Organizations and associations → Mechanical engineering |
| CIMADE | Comité Inter-Mouvements Auprès Des Évacués | In French | → Organizations and associations → 3417 |
| CIME | Comité d’Information et de Mobilisation pour l’Emploi | In French | → Organizations and associations → Labour, labour economics |
| CIMLS | Cercle Informatique Médicale entre Lesse et Semois | In French | → Organizations and associations → Computer science → Medicine |
| CIMP | Commision Internationale de Microflore Paléozoique | In English | → Organizations and associations → Paleobotany, palynology → Botany |
| CIMR | Cambridge Institute for Medical Research | In English | → Research institutes → Medicine |
| CIN | Conferência Internacional sobre Nutrição = CIN | Conferencia Internacional sobre Nutrición | In Spanish = ICN | International Conference on Nutrition | In English = CIN | Conférence Internationale sur la Nutrition | In French |
In Portuguese | → Congresses → Nutrition |
| CIN | Conferencia Internacional sobre Nutrición = ICN (look above) |
In Spanish | → Congresses → Nutrition |
| CINES | Centre Informatique National de l'Enseignement Supérieur (www.cines.fr) | In French | → Computer science → Education |
| CINVESTAV | Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (www.cinvestav.mx) | In Spanish | → Research institutes → Specialized or (poly)technical colleges |
| CIO | Comité International Olympique (www.olympic.org) = IOC | International Olympic Committee | In English = МОК | Международен олимпийски комитет | In Bulgarian = MOO | Međunarodni olimpijski odbor | In Bosnian = COI | Comitè Olímpic Internacional | In Catalan = MOV | Mezinárodní olympijský výbor | In Czech = IOK | Internationales Olympisches Komitee | In German = ΔΟΕ | Διεθνής Ολυμπιακή Επιτροπή | In Greek = IOK | Internacia Olimpika Komitato | In Esperanto = COI | Comité Olímpico Internacional | In Spanish = ROK | Rahvusvaheline Olümpiakomitee | In Estonian = KOK | Kansainvälinen olympiakomitea | In Finnish = COI | Comité Olímpico Internacional | In Galician = MOO | Međunarodni olimpijski odbor | In Croatian = NOB | Nemzetközi Olimpiai Bizottság | In Hungarian = TOK | Tarptautinis olimpinis komitetas | In Lithuanian = IOC | Internationaal Olympisch Comité | In Dutch = IOK | (Den) internasjonale olympiske komité | In Norwegian = MKOI | Międzynarodowy Komitet Olimpijski | In Polish = COI | Comité Olímpico Internacional | In Portuguese = МОК | Международный олимпийский комитет | In Russian = MOK | Međunarodni olimpijski komitet | In Serbo-Croatian = MOV | Medzinárodný olympijský výbor | In Slovak = MOK | Mednarodni olimpijski komite | In Slovenian = МОК | Међународни олимпијски комитет | In Serbian = IOK | Internationella Olympiska Kommitté | In Swedish = МОК | Міжнародний олімпійський комітет | In Ukrainian |
In French | → Organizations and associations → Sport, physical exercises |
| CION | Chevron Is Onze Naam | In Dutch | → Organizations and associations → Sport, physical exercises |
| CIOSL | Confederación Internacional de Organizaciones Sindicales Libres (www.icftu.org) = CISL | Confédération Internationale des Syndicats Libres | In French = ICFTU | International Confederation of Free Trade Unions | In English = CIOSL | Confederação Internacional de Organizações Sindicais Livres | In Portuguese = ICB | International Criminal Bar | In English = BPI | Barreau Pénal International | In French |
In Spanish | → Organizations and associations → Labour, labour economics |
| CIOSL | Confederação Internacional de Organizações Sindicais Livres (www.icftu.org) = CISL, ICFTU, ICB, BPI (look above) |
In Portuguese | → Organizations and associations → Labour, labour economics |
| CIP | Centre d’Information du Public | In French | → Libraries |
| CIP | Communications Interface Processor | In English | → Human-computer interaction → Telecommunications |
| CIP | Control and Interface Panel | In English | → Human-computer interaction |
| CIPFG | Coalition d'Investigation sur la Persécution du Falun Gong en Chine | In French | → Organizations and associations → Modern spiritual movements |
| CIPM | Comité International des Poids et Mesures = CIPM | Comitê International des Pesos e Medidas | In Portuguese |
In French | → Standardization |
| CIPM | Comitê International des Pesos e Medidas = (look above) |
In Portuguese | → Standardization |