

| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| CTI | Centre de Téléphonie Integrée | In French | → Telecommunications | 
| CTI | Connecticut Transportation Institute (www.cti.uconn.edu) | In English | → Research institutes → Transport and postal services | 
| CTIA | Cellular Telecommunications Industry Association (www.ctia.org) | In English | → Associations → Telecommunications | 
| CTIBO | Capacity Building of Chinese Technological Intermediary Business Organisations | In English | → Trade → Engineering, technology → China | 
| CTICM | Centre Technique Industriel de la Construction Métallique | In French | → Civil engineering → Construction | 
| CTIF | Centre Technique des Industries de la Fonderie | In French | → Research institutes → Metallurgy | 
| CTIFL | Centre Technique Interprofessionnel des Fruits et Légumes | In French | → Agricultural sciences | 
| CTINILS | Comité Technique national des Infections Nosocomiales et Infections Liées aux Soins | In French | → Organizations and associations → Infectious diseases | 
| CTIT | Centrum voor Telematica en Informatica Technologie | In Dutch | → Computer science → Telecommunications | 
| CTIT | Centrum voor Telematica en Informatietechnologie | In Dutch | → Research institutes → Telecommunications → Computer science | 
| CTIVV | Centre Technique Interprofessionnel de la Vigne et du Vin | In French | → Research institutes → Agricultural sciences → Beverage industry | 
| CTL | cytotoxic T-Lymphocytes | In English | → Immunology and allergy | 
| CTM | Cordless Terminal Mobility | In English | → Telecommunications | 
| CTM | Commission de Transport de Montréal | In French | → Organizations and associations → Municipal administration → Transport and postal services → Canada | 
| CTNERHI | Centre Technique National d'Études et de Recherches sur les Handicaps et les Inadaptations | In French | → Research institutes → Medicine | 
| CTP | Comité Technique Paritaire | In French | → Engineering, technology | 
| CTP | Centre Technique du Papier (www.webctp.com) | In French | → Research institutes → Paper and board industry | 
| CTS | Comprehensive Transponder Systems | In English | → Telecommunications | 
| CTS | Canadian Technology Satellite | In English | → Astronautics → Canada | 
| CTS | Communications Technology Satellite | In English | → Astronautics → Telecommunications | 
| CTS | Centre de Transfusion Sanguine | In French | → Blood and circulatory system | 
| CTS | Centre des Techniques Spatiales | In French | → Astronautics | 
| CTSA | Centre de Transfusion Sanguine des Armées | In French | → Military affairs → Blood and circulatory system | 
| CTSB | Community Television of the Southern Berkshires (www.ctsbtv.org) | In English | → Telecommunications | 
| CTSC | Centre Technique des Salaisons et Conserves | In French | → Agricultural sciences | 
| CTTB | Centre Technique des Tuiles et Briques | In French | → 666 | 
| CUAMM | Collegio Universitario Aspiranti e Medici Missionari | In Italian | → Specialized or polytechnical colleges → Medicine | 
| CUBS | Center for Unified Biometrics and Sensors | In English | → Research institutes → Biotechnology → Electronics | 
| CUDI | Corporación Universitaria para el Desarrollo de Internet | In Spanish | → Computer science → Telecommunications → Internet | 
| CUE | Command Uplink Electronics | In English | → Electronics | 
| CUED | Cambridge University Engineering Department (www.eng.cam.ac.uk) | In English | → Higher education, universities → Engineering, technology → United Kingdom | 
| CUGI | Clemson University Genomics Institute (www.genome.clemson.edu) | In English | → Research institutes → Genetics → Biotechnology | 
| CUH | Code de l'Urbanisme et de l'Habitation | In French | → Law, jurisprudence → Construction → Regional planning | 
| CUIT | Coût Unitaire des Interventions Techniques | In French | → Prices → Accounting | 
| CUMA | Coopérative d'Utilisation du Matériel Agricole | In French | → Organizations and associations → Agricultural sciences | 
| CUMP | Cellule d'Urgence Médicale Psychologique | In French | → Traumatology → Psychology | 
| CUP | Cambridge University Press (https://www.cambridge.org) | In English | → Organizations and associations → Graphic industries, printing, publishing → Higher education, universities → United Kingdom | 
| CUP | Canadian University Press | In English | → Graphic industries, printing, publishing → Higher education, universities → Canada | 
| CURE | Connecticut United for Research Excellence (www.curenet.org) | In English | → Organizations and associations → Biological sciences → Medicine | 
| CURE | Coût Unitaire de Réalisation des travaux de réseaux Electricité | In French | → Prices → Electrical engineering | 
| CURG | Coût Unitaire de Réalisation des travaux de réseaux Gaz | In French | → Prices → Energy economics | 
| CUTE | Clean Urban Transport Europe | In English | → Vehicle engineering → Transport and postal services | 
| CUTEC | Clausthaler Umwelttechnik-Institut | In German | → Environmental protection → Threats to the environment → Agricultural sciences | 
| CV | Deployable Payloads Operation | In English | → Astronautics | 
| CV-ATOD | Centro Virtual de Información sobre Alcohol, Tabaco y otras Drogas = VC-ATOD | Virtual Clearinghouse on Alcohol, Tobacco, and Other Drugs | In English | In Spanish | → Libraries → Networks, communication → 6635 → 6639 → Pathology | 
| CVA | Convair Astronautics | In English | → Organizations and associations → Aeronautics, aircraft → Astronautics | 
| CVAS | Configuration Verification Accounting System | In English | → Accounting | 
| CVC | Conventional Vibrated Concrete | In English | → Construction | 
| CVC | Centrum voor Vaktaal en Communicatie | In Dutch | → Research institutes → Telecommunications → Language, linguistics, literature | 
| CVCEP | Commission de Vérification des Comptes des Entreprises Publiques | In French | → Accounting | 
| CVCS | Chemical and Volume Control System | In English | → Chemical technology | 
| CVD | امراض القلب | In Arabic | → Cardiology | 
| CVDC | Cambridge Vehicle Dynamics Consortium (https://www-cvdc.eng.cam.ac.uk/) | In English | → Organizations and associations → Automobile manufacturing → United Kingdom | 
| CVE | Compteur Vert Électronique | In French | → Electronics → Energy economics | 
| CVF | Capacité Vitale Forcée | In French | → Chest diseases | 
| CVL | Capacité Vitale Lente | In French | → Chest diseases | 
| CVM | Christian Veterinary Mission (www.cvmusa.org) | In English | → Organizations and associations → Christianity → Veterinary medicine | 
| CVMA | Canadian Veterinary Medical Association (www.canadianveterinarians.net) | In English | → Associations → Veterinary medicine → Canada | 
| CVO | College of Veterinarians of Ontario (www.cvo.org) | In English | → Organizations and associations → Veterinary medicine → Canada | 
| CVP | Central Venous Pressure | In English | → Cardiology → Blood and circulatory system | 
| CVS | Chronisch Vermoeidheidssyndroom | In Dutch | → Pathology | 
| CWC | Chemical Weapons Convention = CAQ | Convención sobre las Armas Químicas | In Spanish = CAC | Convention sur les Armes Chimiques | In French = CAQ | Convenção sobre Armas Químicas | In Portuguese | In English | → International relations → Military engineering | 
| CWDM | Coarse Wavelength Division Multiplexing | In English | → Networks, communication → Telecommunications | 
| CWE | Caution and Warning Electronics | In English | → Electronics | 
| CWEA | Caution and Warning Electronic(s) Assembly | In English | → Electronics | 
| CWEU | Caution and Warning Electronic(s) Unit | In English | → Electronics | 
| CWL | Cardiff International Airport (https://www.cardiff-airport.com/) | In English | → Transport by air → Aeronautics, aircraft → United Kingdom | 
| CWS | Community Water System | In English | → Environmental technology, water supply, waste management | 
| CWSU | Condensate Water Servicing Unit | In English | → Environmental technology, water supply, waste management | 
| CYSDV | Cucurbit Yellow Stunting Disorder Virus | In English | → Virology → Agricultural sciences | 
| CYSF | Cape York Space Facility | In English | → Astronomy → Astronautics | 
| CyT | Ciencia y Tecnología = S&T | Science and Technology | In English = S&T | Sciences et Technologie | In French = C&T | Ciência e Tecnologia | In Portuguese | In Spanish | → Mathematics and natural sciences → Engineering, technology | 
| DA | Douleur Abdominale | In French | → Pathology | 
| DA | Dévidoir Automobile | In French | → Automobile manufacturing → Firefighting | 
| DAA | Diplôme d'Agronomie Approfondie | In French | → Specialized or polytechnical colleges → Agricultural sciences | 
| DAB | Digital Audio Broadcasting | In English | → Telecommunications | 
| DABM | Defense Against Ballistic Missiles | In English | → Military affairs → Military engineering | 
| DAC | Digital-To-Analog Converter | In English | → Computer science → Electronics | 
| DAC | Direction de l'Approvisionnement en Communications | In French | → Telecommunications | 
| DAC | Détachement d'Appui Chirurgical | In French | → Traumatology | 
| DACP | Day-Ahead Commitment Process | In English | → Energy economics → Canada | 
| DACP | Department of Ambulatory Care and Prevention | In English | → Specialized or polytechnical colleges → Medicine | 
| DAD | Détecteur Autonome Déclencheur | In French | → Electrical engineering | 
| DADS | Dual Air Density Satellite | In English | → Astronautics | 
| DAE | Défibrillateur Automatisé Externe | In French | → Cardiology → Traumatology | 
| DAET | Délégué Académique aux Enseignements Techniques | In French | → Education | 
| DAFZA | Dubai Airport Free Zone Authority | In English | → 33972 → Transport by air | 
| DAG | Diplôme d'Agronomie Générale | In French | → Specialized or polytechnical colleges → Agricultural sciences | 
| DAHW | Deutsche Lepra- und Tuberkulosehilfe (www.dahw.de) | In German | → Organizations and associations → Infectious diseases → Germany | 
| DAI | Détection Automatique d'Incident | In French | → Image processing → Transport and postal services | 
| DAI | Death from Accidental Injury | In English | → Pathology → Traumatology | 
| DAIS | Data Avionics Information System | In English | → Software → Data → Aeronautics, aircraft | 
| DAL | Dévidoir Automatique Léger | In French | → Firefighting | 
| DAM | Double-Aluminized Mylar | In English | → Chemical technology | 
| DAM | Direction des Applications Militaires | In French | → Military engineering | 
| DAMA | Demand Assigned Multiple Access | In English | → Telecommunications → Astronautics | 
| DAMHo | Détachement d'Appui Médical et d'Hospitalisation | In French | → Traumatology | 
| DANASAT | Direct-Ascent Nuclear ASAT | In English | → Nuclear technology | 
| DANCE | Département Appui à la Négociation pour la Commercialisation de l'Électricité | In French | → Trade → Energy economics | 
| DAO | Defense Accounting Office | In English | → Accounting → Military affairs | 
| DAP | Descent Analysis Program | In English | → Computer programs → Aeronautics, aircraft → Astronautics | 
| DAP | Dotations aux Amortissements et Provisions | In French | → Accounting | 
| DAP | Dévidoir Automobile Prémélangeur | In French | → Automobile manufacturing → Firefighting | 
| DAPO | Direction des Approvisionnements de la Poste | In French | → Maintenance and logistics → Postal services → France | 
| DARA | Deutsche Agentur für Raumfahrtangelegenheiten | In German | → Organizations and associations → Astronomy → Astronautics → Germany | 
| DARC | Deutscher Amateur-Radio-Club | In German | → Organizations and associations → Telecommunications | 
| DAS | Digital Avionics System | In English | → Computer-based techniques → Aeronautics, aircraft | 
| DASA | Dual Aerospace Servoamplifier | In English | → Aeronautics, aircraft → Astronautics | 
| DASES | Direction de l'Action sociale, de l'Enfance et de la Santé | In French | → Public administration, government → Social welfare → Education → Medicine | 
| DASS | Direction de l'Action Sanitaire et Sociale | In French | → Public administration, government → Social welfare → Medicine | 
| DAT | Déclaration d'Achèvement des Travaux | In French | → Civil engineering → Construction | 
| DAT | Direction des Armements Terrestres | In French | → Public administration, government → Military engineering | 
| DAT | Delta Air Transport | In English | → Transport and postal services | 
| DAT | Déclaration d'Accident du Travail | In French | → Accidents, risks, safety → Personnel management → Labour, labour economics | 
| DATAS | Delta Automated Travel Account System | In English | → Software → Transport by air → Tourism → United States | 
| DATR | Directement Affecté aux Travaux sous Rayonnements | In French | → Nuclear technology | 
| DATT | Dévidoir Automobile Tout-Terrain | In French | → Automobile manufacturing → Firefighting | 
| DAV | Deutscher Apotheker Verlag (www.deutscher-apotheker-verlag.de) | In German | → Organizations and associations → Pharmacology, toxicology → Germany | 
| DAVF | Dural arteriovenous fistulae = FAVD | Fistule Durale Artérioveineuse Intracrânienne | In French | In English | → Pathology → Neurology | 
| DBC | Dictionnaire Biographique des Cheminots | In French | → Dictionaries → Biography → Rail transport engineering → Rail transport → France | 
| DBG | Deutsche Bodenkundliche Gesellschaft (www.dbges.de) | In German | → Organizations and associations → Agricultural sciences → Germany | 
| DBGE | Dictionnaire Biographique des Gaziers-Électriciens | In French | → Dictionaries → Biography → Energy economics → Electrical engineering | 
| DBPV | Design Basis Probability Value | In English | → Nuclear technology | 
| DBW | Differential Ballistic Wind | In English | → Military engineering | 
| DC | Delta Clipper | In English | → Aeronautics, aircraft → Astronautics | 
| DC | Descripteur Comptable | In French | → Accounting | 
| DC | Division Comptabilité | In French | → Accounting | 
| DC | Débit Cardiaque | In French | → Cardiology | 
| DCA | Defense Communications Agency | In English | → Military affairs → Telecommunications | 
| DCA | Defense Communication Agency | In English | → Military affairs → Telecommunications | 
| DCAA | Defense Contract Audit Agency | In English | → Military affairs → Military engineering | 
| DCAN | Direction des Constructions et Armes navales | In French | → Public administration, government → Military engineering | 
| DCAT | Diesel Clean Advanced Technology | In English | → Vehicle engineering | 
| DCCT | Diabetes Control and Complications Trial | In English | → Diagnostics → Physiology | 
| DCD | Developmental Coordination Disorder | In English | → Pathology | 
| DCE | Data and Control Electronics | In English | → Electronics | 
| DCE | Data Circuit-terminating Equipment | In English | → Computer hardware → Data → Telecommunications | 
| DCE | Data Communication Equipment | In English | → Computer hardware → Data → Telecommunications | 
| DCEA | Digital Control Electronics Assembly | In English | → Electronics | 
| DCEM | Deuxième Cycle des Études Médicales | In French | → Education → Medicine | 
| DCEP | Deuxième Cycle des Études Pharmaceutiques | In French | → Education → Pharmacology, toxicology | 
| DCHR | Dévidoir Citerne Hors Route | In French | → Firefighting | 
| DCI | Dénomination Commune Internationale = INN | International Nonproprietary Name | In English = DCI | Denominación Común Internacional | In Spanish = DCI | Denominazione Comune Internazionale | In Italian = МНН | Международное непатентованное название | In Russian | In French | → Pharmacology, toxicology | 
| DCI | Denominación Común Internacional = INN, МНН (look above) | In Spanish | → Pharmacology, toxicology | 
| DCI | Denominazione Comune Internazionale = INN, МНН (look above) | In Italian | → Pharmacology, toxicology | 
| DCJT | 4-(dicyanomethylene)-2-methyl-6-(1,1,7,7-teuramethyljulolidyl-9-enyl)-4H-pyran | In English | → Chemicals | 
| DCJTB | 4-(dicyanomethylene)-2-t-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran | In English | → Chemicals | 
| DCL | Direct Communications Link | In English | → Telecommunications | 
| DCM | Dialogue Communication Multimédia (www.dcminteractive.com) | In French | → Computer science → Graphic industries, printing, publishing | 
| DCMAA | Direction Centrale du Matériel de l'Armée de l'Air | In French | → Public administration, government → Military engineering | 
| DCN | Division Combustibles Nucléaires | In French | → Nuclear technology | 
| DCP | Dispositifs de Concentration de Poisson | In French | → Fishing, hunting | 
| DCS | Diplôme Comptable Supérieur | In French | → Specialized or polytechnical colleges → Accounting | 
| DCS | Defense Communications System | In English | → Telecommunications → Military affairs | 
| DCS | Digital-Coded Squelch | In English | → Telecommunications | 
| DCS | Digital Cellular System | In English | → Telecommunications | 
| DCSD | Département Commande des Systèmes et Dynamique du vol | In French | → Electronics → Aeronautics, aircraft | 
| DCSSA | Direction Centrale du Service de Santé des Armées | In French | → Public administration, government → Medicine | 
| DCTB | Dansk Center for Translationel Brystkræftforskning | In Danish | → Research institutes → Oncology → Denmark | 
| DCTIM | Direction Centrale des Travaux Immobiliers Maritimes | In French | → Environmental technology, water supply, waste management → Construction | 
| DCTN | Defense Commercial Telecommunications Network | In English | → Telecommunications → Military affairs | 
| DCU | Diplôme Comptable d'Université | In French | → Higher education, universities → Accounting | 
| DCU | Pryor Field Regional Airport | In English | → Transport by air → United States | 
| DCVMA | District of Columbia Veterinary Medical Association | In English | → Associations → Veterinary medicine | 
| DDA | Direction Départementale de l'Agriculture | In French | → Public administration, government → Agricultural sciences | 
| DDAF | Direction Départementale de l'Agriculture et de la Forêt | In French | → Regional administration → Agricultural sciences → Forestry | 
| DDASS | Direction Départementale des Affaires Sanitaires et Sociales | In French | → Regional administration → Social welfare → Medicine | 
| DDB | Double Dérivation de Branchements | In French | → Electrical engineering | 
| DDC | Defense Documentation Center | In English | → Documentation → Military affairs → Military engineering | 
| DDD | Dense Deposit Disease | In English | → Physiology → Pathology | 
| DDD | Den Danske Dyrlægeforening (www.ddd.dk) | In Danish | → Organizations and associations → Agricultural sciences → Denmark | 
| DDD | Department of Developmental Disabilities | In English | → Pathology | 
| DDDS | Drug Discovery and Development Summit | In English | → Pharmacology, toxicology | 
| DDE | Direction Départementale de l'Équipement | In French | → Regional administration → Civil engineering | 
| DDF | De Dietrich Ferroviaire | In French | → Organizations and associations → Rail transport engineering → France | 
| DDG | Deutsche Diabetes Gesellschaft (www.deutsche-diabetes-gesellschaft.de) | In German | → Organizations and associations → Physiology → Pathology → Germany | 
| DDL | Date de Dernière Lecture | In French | → Advertising → Newspapers, journalism | 
| DDN | Defense Data Network | In English | → Networks, communication → Telecommunications → Military affairs | 
| DDP | Disc Description Protocol | In English | → Cinema, movies → Telecommunications | 
| DDREF | Dose and Dose Rate Effectiveness Factor | In English | → Nuclear technology | 
| DDRM | Dossier Départemental des Risques Majeurs | In French | → 351 → Accidents, risks, safety | 
| DDRM | Dossier Départemental sur les Risques Majeurs | In French | → Regional administration → Accidents, risks, safety | 
| DDS | Drug Delivery System | In English | → Pharmacology, toxicology | 
| DDSIS | Direction Départementale des Services d'Incendie et de Secours | In French | → Regional administration → Firefighting → Traumatology | 
| DDT | Dichlorodiphényltrichloréthane = ДДТ | дихлоро-дифенил-трихлороетан | In Bulgarian = DDT | Dihlor-difenil-trihloretan | In Bosnian = DDT | Dicloro-difenil-tricloroetà | In Catalan = DDT | Dichlordiphenyltrichlorethan | In Danish = DDT | Dichlordiphenyltrichlorethan | In German = DDT | Dichlorodiphenyltrichloroethane | In English = DDT | Diklor-difenil-trikloretano | In Esperanto = DDT | Dicloro-difenil-tricloroetano | In Spanish = DDT | Diklorodifenüültrikloroetaan | In Estonian = DDT | Dikloori-difenyyli-trikloorietaani | In Finnish = די די טי | דיכלורו-דיפניל-טריכלורו-אתאן | In Hebrew = DDT | Diklór-difenil-triklór-etán | In Hungarian = DDT | Diclorodifeniltricloroetano | In Italian = DDT | Dichloro-Difenil-Trichloroetanas | In Lithuanian = DDT | Dichloordifenyltrichloorethaan | In Dutch = DDT | Diklor-difenyl-trikloretan | In Nynorsk = DDT | Dichlorodifenylotrichloroetan | In Polish = DDT | Dicloro-Difenil-Tricloroetano | In Portuguese = DDT | Diclor-Difenil-Tricloretan | In Romanian = ДДТ | ДихлорДифенилТрихлорметилметан | In Russian = DDT | Dichlórdifenyltrichlóretán | In Slovak = DDT | Dikloro-Difenil-Trikloroetan | In Slovenian = ДДТ | Дихлор-дифенил-трихлоретан | In Serbian = DDT | Diklordifenyltrikloretan | In Swedish = DFS | Deutsche Flugsicherung GmbH | In German | In French | → Chemicals → Agricultural sciences | 
| DDT | Dihlor-difenil-trihloretan = ДДТ, די די טי, DFS (look above) | In Bosnian | → Chemicals → Agricultural sciences | 
| DDT | Dicloro-difenil-tricloroetà = ДДТ, די די טי, DFS (look above) | In Catalan | → Chemicals → Agricultural sciences | 
| DDT | Dichlordiphenyltrichlorethan = ДДТ, די די טי, DFS (look above) | In Danish | → Chemicals → Agricultural sciences | 
| DDT | Dichlordiphenyltrichlorethan = ДДТ, די די טי, DFS (look above) | In German | → Chemicals → Agricultural sciences | 
| DDT | Dichlorodiphenyltrichloroethane = ДДТ, די די טי, DFS (look above) | In English | → Chemicals → Agricultural sciences | 
| DDT | Diklor-difenil-trikloretano = ДДТ, די די טי, DFS (look above) | In Esperanto | → Chemicals → Agricultural sciences | 
| DDT | Dicloro-difenil-tricloroetano = ДДТ, די די טי, DFS (look above) | In Spanish | → Chemicals → Agricultural sciences | 
| DDT | Diklorodifenüültrikloroetaan = ДДТ, די די טי, DFS (look above) | In Estonian | → Chemicals → Agricultural sciences | 
| DDT | Dikloori-difenyyli-trikloorietaani = ДДТ, די די טי, DFS (look above) | In Finnish | → Chemicals → Agricultural sciences | 
| DDT | Diklór-difenil-triklór-etán = ДДТ, די די טי, DFS (look above) | In Hungarian | → Chemicals → Agricultural sciences | 
| DDT | Diclorodifeniltricloroetano = ДДТ, די די טי, DFS (look above) | In Italian | → Chemicals → Agricultural sciences | 
| DDT | Dichloro-Difenil-Trichloroetanas = ДДТ, די די טי, DFS (look above) | In Lithuanian | → Chemicals → Agricultural sciences | 
| DDT | Dichloordifenyltrichloorethaan = ДДТ, די די טי, DFS (look above) | In Dutch | → Chemicals → Agricultural sciences | 
| DDT | Diklor-difenyl-trikloretan = ДДТ, די די טי, DFS (look above) | In Nynorsk | → Chemicals → Agricultural sciences | 
| DDT | Dichlorodifenylotrichloroetan = ДДТ, די די טי, DFS (look above) | In Polish | → Chemicals → Agricultural sciences |