| CCH | Code de la Construction et de l'Habitation | In French | → Civil engineering → Building |
| CCM | Carbon Ceramic Material | In English | → Materials science → Automobile manufacturing |
| CCMAT | Canadian Centre for Mine Action Technologies = CCTD | Centre Canadien des Technologies de Déminage | In French |
In English | → Military engineering |
| CCMTA | Cape Canaveral Missile Test Annex | In English | → Military engineering |
| CCRRDT | Comité Consultatif Régional pour la Recherche et le Développement Technologique | In French | → Organizations and associations → Research policy |
| CCSD | Chrysler Corporation Space Division | In English | → Spaceflight engineering, astronautics |
| CCSDS | Consultative Committee for Space Data Systems | In English | → Organizations and associations → Electronics → Spaceflight engineering, astronautics |
| CCSTI | Centre de Culture Scientifique, Technique et Industrielle | In French | → Civilization, culture, progress → Mathematics and natural sciences |
| CCTD | Centre Canadien des Technologies de Déminage = CCMAT (look above) |
In French | → Military engineering |
| CCUJ | Center for Coal Utilization | In English | → Energy economics |
| CDARA | Conception, Décision, Adaptation du Réseau aux Attentes | In French | → Quality management → Electrical engineering |
| CDCAS | Centrul de Documentare pentru Construcţii, Arhitectură, Urbanism şi Amenajarea Teritoriului | In Romanian | → Civil engineering → Building → Regional planning → Architecture |
| CDE | Corporación Dominicana de Electricidad (www.cde.gov.do) | In Spanish | → Electrical engineering |
| CDEH | Comité Directivo para la Energía del Hemisferio = HESC | Hemispheric Energy Steering Committee | In English = CDEH | Comité Directeur pour l'Énergie dans l'Hémisphère | In French = CDEH | Comitê Diretor para a Energia do Hemisfério | In Portuguese |
In Spanish | → International economic cooperation → Energy economics |
| CDEH | Comité Directeur pour l'Énergie dans l'Hémisphère = HESC (look above) |
In French | → International economic cooperation → Energy economics |
| CDEH | Comitê Diretor para a Energia do Hemisfério = HESC (look above) |
In Portuguese | → International economic cooperation → Energy economics |
| CDF | Charbonnages de France | In French | → Mining |
| CDSF | Commercially Developed Space Facility | In English | → Astronomy → Spaceflight engineering, astronautics |
| CDT | Conseiller en Développement Technologique | In French | |
| CE | Civil Engineering | In English | → Civil engineering → Building |
| CE | Corps of Engineers | In English | |
| CEA | Consumer Electronics Association | In English | → Associations → Electronics |
| CEA | Control Element Assembly | In English | |
| CEA | Control Electronics Assembly | In English | → Electronics |
| CEA | Commissariat à l'Énergie Atomique | In French | → Research institutes → Nuclear, atomic, and molecular physics → Energy economics |
| CEA | Commissariat à l’Énergie Atomique | In French | → Organizations and associations → 5931 → Energy economics → 6210 |
| CEB | Comité Électrotechnique Belge = BEC | Belgisch Elektrotechnisch Comité | In Dutch |
In English | → Electrical engineering |
| CEBTP | Centre d'Étude du Bâtiment et des Travaux Publics | In French | → Civil engineering → Building |
| CEBTP | Centre Expérimental du Bâtiment et des Travaux Publics | In French | → Research institutes → Civil engineering → Building |
| CEC | Consolidated Electrodynamics Corporation | In English | → Electrical engineering |
| CEC | Consolidated Electronics Corporation | In English | → Electronics |
| CEC | Control Electronics Container | In English | → Electronics |
| CECA | Comunità Europea del Carbone e dell'Acciaio = EKSF | Europæiske Kul- og Stålfællesskab | In Danish = ESUO | Evropské společenství uhlí a oceli | In Czech = EZUČ | Europska zajednica za ugljen i čelik | In Croatian = CECA | Comunidad Europea del Carbón y del Acero | In Spanish = CECA | Communauté Européenne du Charbon et de l'Acier | In French = EGKS | Europese Gemêenschap voo Kooln en Stoal | In Vlaams = ECSC | European Coal and Steel Community | In English = ЕОВС | Европейската общност за въглища и стомана | In Bulgarian = CECA | Comunitat Europea del Carbó i de l'Acer | In Catalan = EGKS | Europäische Gemeinschaft für Kohle und Stahl | In German = CECA | Comunidade Europea do Carbón e do Aceiro | In Galician = EWWiS | Europejska Wspólnota Węgla i Stali | In Polish = CECA | Comunautat Europèa del Carbon e de l'Acièr | In Occitan = EKSF | Det europeiske kull- og stålfellesskap | In Norwegian = EGKS | Europese Gemeenschap voor Kolen en Staal | In Dutch = ESZAK | Európai Szén- és Acélközösség | In Hungarian = CECA | Comunidade Europeia do Carvão e do Aço | In Portuguese = CECO | Comunitatea Europeană a Cărbunelui şi Oţelului | In Romanian = ЕОУС | Европейское объединение угля и стали | In Russian = ESUO | Európske spoločenstvo pre uhlie a ocel | In Slovak = EHYT | Euroopan hiili- ja teräsyhteisö | In Finnish = EKSG | Europeiska kol- och stålgemenskapen | In Swedish = EAPB | Europos anglių ir plieno bendrija | In Lithuanian |
In Italian | → International relations → International economic cooperation → Mining → Metallurgy |
| CECA | Comunidade Europea do Carbón e do Aceiro = EKSF, ESUO, EZUČ, EGKS, ECSC, ЕОВС, EWWiS, ESZAK, CECO, ЕОУС, EHYT, EKSG, EAPB (look above) |
In Galician | → International relations → International economic cooperation → Mining → Metallurgy |
| CECA | Comunidade Europeia do Carvão e do Aço = EKSF, ESUO, EZUČ, EGKS, ECSC, ЕОВС, EWWiS, ESZAK, CECO, ЕОУС, EHYT, EKSG, EAPB (look above) |
In Portuguese | → International relations → International economic cooperation → Mining → Metallurgy |
| CECA | Comunautat Europèa del Carbon e de l'Acièr = EKSF, ESUO, EZUČ, EGKS, ECSC, ЕОВС, EWWiS, ESZAK, CECO, ЕОУС, EHYT, EKSG, EAPB (look above) |
In Occitan | → International relations → International economic cooperation → Mining → Metallurgy |
| CECA | Comunitat Europea del Carbó i de l'Acer = EKSF, ESUO, EZUČ, EGKS, ECSC, ЕОВС, EWWiS, ESZAK, CECO, ЕОУС, EHYT, EKSG, EAPB (look above) |
In Catalan | → International relations → International economic cooperation → Mining → Metallurgy |
| CECA | Comunidad Europea del Carbón y del Acero = EKSF, ESUO, EZUČ, EGKS, ECSC, ЕОВС, EWWiS, ESZAK, CECO, ЕОУС, EHYT, EKSG, EAPB (look above) |
In Spanish | → International relations → International economic cooperation → Mining → Metallurgy |
| CECA | Communauté Européenne du Charbon et de l'Acier = EKSF, ESUO, EZUČ, EGKS, ECSC, ЕОВС, EWWiS, ESZAK, CECO, ЕОУС, EHYT, EKSG, EAPB (look above) |
In French | → International relations → International economic cooperation → Mining → Metallurgy |
| CECC | CENELEC Electronic Components Committee | In English | → Electrical engineering → Electronics |
| CECE | Committee for the European Construction Equipment (www.cece-eu.org) | In English | → Organizations and associations → Civil engineering → Building |
| CECIMO | Comité Européen de Coopération des Industries de la Machine-Outil (www.cecimo.be) | In French | → Organizations and associations → Mechanical engineering |
| CECO | Comunitatea Europeană a Cărbunelui şi Oţelului = CECA, EKSF, ESUO, EZUČ, EGKS, ECSC, ЕОВС, EWWiS, ESZAK, ЕОУС, EHYT, EKSG, EAPB (look above) |
In Romanian | → International relations → International economic cooperation → Mining → Metallurgy |
| CEE | Computers and Electrical Engineering | In English | → Serial publications, periodicals → Computer science → Electrical engineering |
| CEEETA | Centro de Estudos em Economia da Energia, dos Transportes e do Ambiente | In Portuguese | → Research institutes → Nature → Energy economics → Applied sciences, technology |
| CEEJ | Canadian Electrical Engineering Journal | In English | → Serial publications, periodicals → Electrical engineering |
| CEFIGRE | Centre de Formation Internationale à la Gestion des Ressources en Eau | In French | → 6281 |
| CEGELY | Centre de Génie Électrique de Lyon | In French | → Research institutes → Electrical engineering |
| CeGIBAT | Centre d’information de Gaz de France pour l’Industrie et le Bâtiment | In French | → Energy economics → Industry, industrial policy → Building |
| CEI | Comitato Elettrotecnico Italiano (www.ceiuni.it) | In Italian | → Organizations and associations → Electrical engineering |
| CEI | Commission Électrotechnique Internationale = IEC | International Electrotechnical Commission | In English = CEI | Comisión Electrotécnica Internacional | In Spanish = CEI | Comissão Eletrotécnica Internacional | In Portuguese |
In French | → Electrical engineering |
| CEI | Comisión Electrotécnica Internacional = IEC (look above) |
In Spanish | → Electrical engineering |
| CEI | Comissão Eletrotécnica Internacional = IEC (look above) |
In Portuguese | → Electrical engineering |
| CEIDRE | Centre d'Expertise et d'Inspection dans le Domaine de la Réalisation et de l'Exploitation | In French | → Electrical engineering |
| CELE | Committee on Evaporation Loss Estimation | In English | → Mining → 665 |
| CELV | Commercial Expendable Launch Vehicle | In English | → Vehicle engineering |
| CEMEF | Centre de Mise en Forme des Matériaux (www-cemef.cma.fr) | In French | → Research institutes → Materials science |
| CEMES | Centre d'Élaboration de Matériaux et d'Études Structurales (www.cemes.fr) | In French | → Research institutes → Materials science |
| CEMETE | Centre d’Essais des Matériaux et d’Études sur les Techniques d’Exécution | In French | → Materials science |
| CEN | Centre d'Études Nucléaires | In French | → Nuclear, atomic, and molecular physics → Nuclear technology |
| CENEf | Center for Energy Efficiency | In English | → Energy economics |
| CENELEC | Comité Européen de Normalisation Électrotechnique | In French | → Standardization → Electrical engineering |
| CENG | Centre d'Études Nucléaires de Grenoble | In French | → Nuclear, atomic, and molecular physics → Energy economics → Nuclear technology |
| CEnTp | Engineering Thermophysics China | In English | → Serial publications, periodicals → Thermodynamics |
| CEO | Centro di Eccellenza Optronica | In Italian | → Optics → Electronics |
| CEP | Centre Énergétique et Procédés | In French | → Energy economics |
| CEP | Calcolatrice Elettronica Pisana | In Italian | → Computer science → Electronics |
| CEPEL | Centro de Pesquisas de Energia Elétrica | In Portuguese | → Electrical engineering |
| CERCHAR | Centre d'Études et de Recherches des Charbonnages | In French | → Mining |
| CEREM | Centre d'Études et de Recherches sur les Matériaux | In French | → Research institutes → Materials science |
| CEREN | Centre d'Études et de Recherche sur les Énergies | In French | → Energy economics |
| CERGA | Centrale Électrique Rhénane de Gambsheim | In French | → Electrical engineering |
| CERIB | Centre d'Études et de Recherches de l'Industrie du Béton | In French | → Research institutes → Civil engineering → Building |
| CERMA | Centre d'Études et de Recherches en Mécanismes et Automatismes | In French | → Mechanical engineering |
| CERMA | Centre d'Études et de Recherches de Médecine Aéronautique | In French | → Medicine → Aeronautics, aircraft |
| CERMO | Centre d'Études et de Recherches de la Machine-Outil | In French | → Mechanical engineering |
| CERN | Centre Européen de Recherche Nucléaire (www.cern.ch) | In French | → Nuclear, atomic, and molecular physics → Nuclear technology |
| CERTH | Centre for Research and Technology Hellas | In English | → Research policy |
| CERTU | Centre d'Études sur les Réseaux, les Transports, l'Urbanisme et les constructions publiques | In French | → Civil engineering → Transport and postal services → Building |
| CES | Company for Energy Saving | In English | → Energy economics |
| CES | Consumer Electronics Show | In English | → Computer science → Electronics |
| CES | Control Electronics Section | In English | → Electronics |
| CESA | Canadian Engineering Standards Association | In English | → Standardization → Associations |
| CESAR | Centro de Estudos e Sistemas Avançados do Recife | In Portuguese | |
| CESTA | Centre d'Études des Systèmes et des Technologies Avancées | In French | |
| CETE | Centre d'Études Techniques de l'Équipement | In French | → Civil engineering |
| CETE | Centre d'Étude Technique de l'Équipement | In French | → Civil engineering → Transport and postal services |
| CETHIL | Centre de Thermique de Lyon | In French | → Thermodynamics → Mechanical engineering |
| CETIAT | Centre Technique des Industries Aérauliques et Thermiques | In French | |
| CETIM | Centre Technique des Industries Mécaniques | In French | → Mechanical engineering |
| CETU | Centre d'Études Techniques des Tunnels | In French | → Civil engineering |
| CETU | Centre d'Études des Tunnels | In French | → Research institutes → Civil engineering |
| CETUR | Centre d'Études Techniques des Transports Urbains | In French | → Vehicle engineering → Transport and postal services |
| CEU | Control Electronics Unit | In English | → Electronics |
| CEV | Crew Exploration Vehicle | In English | → Vehicle engineering |
| CEVE | Comité Européen du Véhicule Expérimental | In French | → Vehicle engineering |
| CFAE | Contractor-Furnished Airborne Equipment | In English | → Aeronautics, aircraft |
| CFAO | Conception et Fabrication Assistées par Ordinateur | In French | → Computer-based techniques |
| CFBR | Comité Français des Barrages et Réservoirs | In French | → Civil engineering → 626 |
| CFE | Comisión Federal de Electricidad | In Spanish | → Organizations and associations → Central administration → Electrical engineering |
| CFGB | Comité Français des Grands Barrages | In French | → Civil engineering → 626 |
| CFM | Compagnie Française du Méthane | In French | → Energy economics |
| CFME | Centre de Formation aux Métiers de l'Environnement | In French | → Education → Environment, environmental sciences → Environmental technology, water supply, waste management |
| CFP | Conceptual Flight Profile | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| CFPET | Centre de Formation des Professeurs de l'Enseignement Technique | In French | → Education |
| CFTE | Centre de Formation aux Techniques de l'Eau | In French | → Specialized or (poly)technical colleges → Environmental technology, water supply, waste management |
| CFTE | Center for Transportation Excellence | In English | → Vehicle engineering → Transport and postal services |
| CGC | Compagnie Générale de Chauffe | In French | → Environmental technology, water supply, waste management |
| CGE | Compagnie Générale des Eaux | In French | → Environmental technology, water supply, waste management |
| CGE | Compagnie Générale d'Électricité | In French | → Electrical engineering |
| CGEA | Compagnie Générale d'Entreprise Automobile | In French | → Automobile manufacturing |
| CGES | Centre de Géotechnique et d'Exploitation du Sous-sol | In French | → Earth sciences → Mining |
| cGMP | Current Good Manufacturing Practices | In English | |
| CHARTH | Compagnie Holding d'Applications et de Réalisations Thermiques et Hydrauliques | In French | → Organizations and associations → Energy economics → Mechanical engineering |
| ChIEJ | Chinese Institute of Engineers Journal | In English | → Serial publications, periodicals |
| CHIR | Chirurgie, Informatique et Robotique | In French | → Computer science → Surgery, orthopaedics, ophthalmology → Mechanical engineering → Electronics |
| 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 |
| ChJSS | Chinese Journal of Space Science | In English | → Serial publications, periodicals → Astronomy → Spaceflight engineering, astronautics |
| CHMAC | Coopération Homme-Machine pour l'Assistance à la conduite | In French | → Human-computer interaction → Vehicle engineering → Transport and postal services |
| ChSAJ | Chinese Society of Astronautics Journal | In English | → Serial publications, periodicals → Astronomy → Spaceflight engineering, astronautics |
| ChSMJ | Chinese Society of Mechanical Engineers Journal | In English | → Serial publications, periodicals → Mechanical engineering |
| ChSST | Chinese Space Science Technology | In English | → Serial publications, periodicals → Astronomy → Spaceflight engineering, astronautics |
| CIC | Chauffage Individuel Centralisé | In French | → Energy economics |
| CICF | Chambre des Ingénieurs-Conseil de France | In French | → Organizations and associations |
| CIDEM | Compagnie Internationale de Développement Minier | In French | → Mining |
| CIDEN | Centre d’Ingénierie Déconstruction et ENvironnement | In French | → Environmental technology, water supply, waste management |
| CIE | Cyprus Institute of Energy | In English | → Energy economics |
| CIE | Commission Internationale de l'Éclairage | In French | → Electrical engineering |
| CIEEMG | Commission Interministérielle d'Étude des Exportations de Matériels de Guerre | In French | → Military engineering |
| CIFTA | Convención Interamericana contra la Fabricación y el Tráfico Ilícitos de Armas de Fuego, Municiones, Explosivos y Otros Materiales Relacionados = CIFTA | Inter-American Convention against the Illicit Manufacturing of and Trafficking in Firearms, Ammunition, Explosives, and Other Related Materials | In English = CIFTA | Convention Interaméricaine contre la Fabrication et le Trafic illicites d'Armes à feu, munitions, explosifs et autres matériels connexes | In French = CIFTA | Convenção Interamericana contra a Fabricação Ilícita e o Tráfico de Armas de Fogo, Munições, Explosivos, e Outros Materiais Relacionados | In Portuguese |
In Spanish | → International relations → Military engineering |
| CIFTA | Convenção Interamericana contra a Fabricação Ilícita e o Tráfico de Armas de Fogo, Munições, Explosivos, e Outros Materiais Relacionados = (look above) |
In Portuguese | → International relations → Military engineering |
| CIFTA | Convention Interaméricaine contre la Fabrication et le Trafic illicites d'Armes à feu, munitions, explosifs et autres matériels connexes = (look above) |
In French | → International relations → Military engineering |
| CIFTA | Inter-American Convention against the Illicit Manufacturing of and Trafficking in Firearms, Ammunition, Explosives, and Other Related Materials = (look above) |
In English | → International relations → Military engineering |
| CIG | Centre d’Ingénierie Générale | In French | |
| CIGRE | Conférence Internationale des Grands Réseaux Électriques à haute tension | In French | → Organizations and associations → Electrical engineering |
| CIH | Centre d’Ingénierie Hydraulique | In French | → Mechanical engineering |
| 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 |
| CIM | Computer-Integrated Manufacturing | In English | → Hardware → Electronics |
| CIMAC | Conseil International des Machines à Combustion | In French | → Organizations and associations → Mechanical engineering |
| CIME | Centre Inter-régional des Mouvements d’Énergie | In French | → Energy economics |
| CIPN | Centre d’Ingénierie du Parc Nucléaire en exploitation | In French | → Nuclear technology |
| CIPP | Cured-In-Place Piping | In English | → Environmental technology, water supply, waste management |
| CIPR | Commission Internationale de Protection Radiologique | In French | → Nuclear technology |
| CIPREL | Compagnie Ivoirienne de PRoduction d’ÉLectricité | In French | → Electrical engineering |
| CIRA | Contrôle Industriel et Régulation Automatique | In French | → Specialized or (poly)technical colleges → Mechanical engineering |
| CIRASTI | Collectif Interassociatif pour la Réalisation d'Activités Scientifiques et Techniques Internationales | In French | → International relations → Applied sciences, technology |
| CIRCE | Confusion-limited Infrared Cosmology Explorer | In English | → Cosmology → Spaceflight engineering, astronautics |
| CIRIMAT | Centre Interuniversitaire de Recherche et d’Ingénierie des Matériaux (www.cirimat.cnrs.fr) | In French | → Research institutes → Materials science |
| CIRRIS | Cryogenic Infrared Radiance Instrumentation for Shuttle | In English | → Spaceflight engineering, astronautics |
| CIRRIS | Cryogenic Infrared Radiance Instrument for Shuttle | In English | → Spaceflight engineering, astronautics |
| CIS | Community Innovation Survey | In English | |
| CIS | Contact Image Sensor | In English | → Electronics |
| CIT | California Institute of Technology | In English | |
| CIT | Centro de Información Tecnológica | In Spanish | → Libraries |
| CIT | Centre d'Ingénierie Thermique | In French | → Energy economics |
| CIUMR | Comisión Internacional de Unidades y Medidas Radiológicas = ICRU | International Commission on Radiation Units and Measurements | In English = CIUMR | Commission Internationale des Unités et des Mesures de Radiation | In French = CIUMR | Comissão Internacional de Unidades e Medidas Radiação | In Portuguese |
In Spanish | → Standardization → Nuclear technology |
| CIUMR | Commission Internationale des Unités et des Mesures de Radiation = ICRU (look above) |
In French | → Standardization → Nuclear technology |
| CIUMR | Comissão Internacional de Unidades e Medidas Radiação = ICRU (look above) |
In Portuguese | → Standardization → Nuclear technology |
| CJE | Compteur Jaune Électronique | In French | → Electrical engineering |
| CJECE | Canadian Journal of Electrical Computer Engineering | In English | → Serial publications, periodicals → Computer science → Electrical engineering |
| CLE | Compteur Libre Énergie | In French | → Energy economics → Electrical engineering |
| CLER | Comité de Liaison Énergies Renouvelables | In French | → Energy economics |
| CLM | Circumlunar Mission | In English | → Spaceflight engineering, astronautics |
| CLOT | Combined Loads Orbiter Test | In English | → Spaceflight engineering, astronautics |
| CLS | Contingency Landing Site | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| CLS | Collecte Localisation Satellites | In English | → Spaceflight engineering, astronautics → Earth sciences |
| CLSO | Contingency Landing Support Officer | In English | → 692973 → Spaceflight engineering, astronautics |
| CMA | Compagnie Maritime d'Affrètement | In French | → 6295 → Transport and postal services |
| CMAG | Cruise Missile Advanced Guidance | In English | → Military engineering |
| CMAME | Computer Methods in Applied Mechanics and Engineering | In English | → Serial publications, periodicals → Computer science → 531 → Mechanical engineering |
| CME | Consiliul Mondial al Energiei = CME | Conseil Mondial de l'Énergie | In French = WEC | World Energy Council | In English |
In Romanian | → Organizations and associations → International relations → Energy economics |
| CME | Congrès Mondial de l’Énergie | In French | → Congresses → Energy economics |
| CME | Conseil Mondial de l'Énergie = WEC (look above) |
In French | → Organizations and associations → International relations → Energy economics |
| CMMIC | Compagnie Minière et Métallurgique de l’Indo-Chine | In French | → Mining → Metallurgy |
| CMOI | Contrôles et Mesures Optiques pour l’Industrie | In French | |
| CMOS | Complementary Metal Oxide Semiconductor | In English | → Electronics |
| CmpEn | Composites Engineering | In English | → Serial publications, periodicals → Materials science |
| CmpMa | Composites Manufacturing | In English | → Serial publications, periodicals → Materials science |
| CmpSt | Composite Structures | In English | → Serial publications, periodicals → Materials science |
| CMS | Composants à Montage de Surface | In French | → Electronics |
| CNA | Caisse Nationale des Autoroutes | In French | → Civil engineering → Transport and postal services |
| CNAE | Comissão Nacional de Atividades Espaciais | In Portuguese | → Astronomy → Spaceflight engineering, astronautics |
| CNC | Commande Numérique par Calculateur | In French | |
| CNDRI | Contrôle Non Destructif par Rayonnements Ionisants | In French | → Mechanical engineering |
| CNEA | Comisión Nacional de Energía Atómica (www.cnea.gov.ar) | In Spanish | → Central administration → Nuclear technology |
| CNEH | Centre National d’Équipement Hydraulique | In French | → Energy economics |
| CNEN | Centre National d’Équipement Nucléaire | In French | → Energy economics → Nuclear technology |
| CNEPE | Centre National d’Équipement de Production d’Électricité | In French | → Electrical engineering |
| CNES | Centre National d’Exploitation du Système | In French | → Electrical engineering |
| CNES | Centre National d'Études Spatiales (www.cnes.fr) | In French | → Astronomy → Spaceflight engineering, astronautics |
| CNET | Centre National d’Équipement Thermique | In French | → Energy economics |
| CNFM | Comité National Français de la Mécanique | In French | → Organizations and associations → Mechanical engineering |
| CNFME | Centre National de Formation aux Métiers de l'Eau | In French | → Hydrology → Environmental technology, water supply, waste management |
| CNIR | Centre National d’Ingénierie du Réseau | In French | → Electrical engineering |
| CNME | Communications in Numerical Methods in Engineering | In English | → Serial publications, periodicals → Mathematics |
| CNPE | Centre Nucléaire de Production d’Électricité | In French | → Nuclear technology → Electrical engineering |
| CNR-CME | Comitetul Naţional Român al Consiliului Mondial al Energiei | In Romanian | → Public administration, government → Energy economics |
| CNRI | Comitetul National Român de Iluminat | In Romanian | → Environmental technology, water supply, waste management |
|