| Acronym | Definition |
|---|
| DEC➣Digital Equipment Corporation |
| DEC➣December |
| DEC➣Decimal |
| DEC➣Decision |
| DEC➣Department of Environmental Conservation |
| DEC➣Department of Environment and Conservation (NSW, Australia) |
| DEC➣Decade |
| DEC➣Declared |
| DEC➣Decorated |
| DEC➣Decode |
| DEC➣Decrease |
| DEC➣Declaration |
| DEC➣Decorative |
| DEC➣Deceased |
| DEC➣Division for Early Childhood (Council for Exceptional Children) |
| DEC➣Drug Endangered Children (program) |
| DEC➣Display Energy Certificate (UK energy certificate for commercial buildings) |
| DEC➣Declination |
| DEC➣Decrement |
| DEC➣Disasters Emergency Committee (UK) |
| DEC➣Departamento de Engenharia Civil (Portugese) |
| DEC➣Diplôme d'Expertise Comptable (French: Diploma of Chartered Accounting) |
| DEC➣Democratic Executive Committee (politics; various locations) |
| DEC➣Division of Environmental Chemistry (various locations) |
| DEC➣Division des Examens et Concours (French: Division of Examinations and Competitions) |
| DEC➣Devon Energy Corporation (various locations) |
| DEC➣Diplôme d'Etudes Collégiales (French: College Diploma; Canada) |
| DEC➣Drug Enforcement Commission (Zambia) |
| DEC➣Development Education Centre |
| DEC➣Digital Electronic Control |
| DEC➣Data Entry Clerk |
| DEC➣Dietary Energy Consumption (food security) |
| DEC➣Dépannage Entretien Chauffage (French: Heating Maintenance Troubleshooting) |
| DEC➣Department Executive Committee (various organizations) |
| DEC➣Diethylcarbamazine |
| DEC➣District Export Council |
| DEC➣Département d'Etudes Cognitives (French: Department of Cognitive Studies) |
| DEC➣Disability Empowerment Center (various locations) |
| DEC➣Developpement Economique Canada (French: Canada Economic Development) |
| DEC➣Disaster Emergency Communications |
| DEC➣Durban Exhibition Centre (South Africa) |
| DEC➣Digital Entertainment Center (various companies) |
| DEC➣Digital Electronic Computer |
| DEC➣Directory Experts Conference |
| DEC➣Double Error Correction |
| DEC➣Decoding Circuit |
| DEC➣Decryption |
| DEC➣Data Exchange Center |
| DEC➣Digital Ethernet Personal Computer |
| DEC➣Digital Entertainment Center |
| DEC➣Decompressor |
| DEC➣Diethyl Carbonate |
| DEC➣Decrescendo |
| DEC➣Declarations Page (insurance) |
| DEC➣Diagnostic Expertise Conseil (French: Diagnostic Expertise Consulting) |
| DEC➣Diversified Energy Corporation |
| DEC➣Diplôme d'Etudes Chorégraphiques (French: Diploma of Choreography Studies) |
| DEC➣Delaware Electric Cooperative |
| DEC➣Digital Engine Control |
| DEC➣Device Clear |
| DEC➣District Environmental Commission (Vermont) |
| DEC➣Distance Education Center |
| DEC➣Direct Energy Conversion |
| DEC➣Diabetes Education Center |
| DEC➣Decatur, GA, USA (airport code) |
| DEC➣Dépôts Électrolytiques et Chimiques (French metal processing company) |
| DEC➣Department of Environmental Control |
| DEC➣Development Experience Clearinghouse (USAID) |
| DEC➣Drug Evaluation Committee |
| DEC➣Dévéloppement Économique Canada pour les Régions du Québec (French) |
| DEC➣Direccion de Estadistica y Censo (Spanish) |
| DEC➣Doctor of Economics |
| DEC➣Daily Effective Circulation (advertising) |
| DEC➣Deratting Exemption Certificate (shipping) |
| DEC➣DEME Environmental Contractors |
| DEC➣Distributed Education Center |
| DEC➣Developmental Evaluation Clinic |
| DEC➣Dictionnaire Explicatif et Combinatoire (French: Explanatory Combinatorial Dictionary) |
| DEC➣Department of the Environment and Conservation |
| DEC➣Director's Executive Council |
| DEC➣Diplôme d'Etudes Complémentaires (French: Complementary Diploma; Belgium) |
| DEC➣Decatur, IL, USA - Decatur Municiple Airport (Airport Code) |
| DEC➣Digital Effects Control (photography, used in digital cameras color settings) |
| DEC➣Data Evolution Corporation (New Orleans, LA and Ontario, Canada) |
| DEC➣Development and Education Committee |
| DEC➣Design, Engineering and Computing |
| DEC➣Douglas Electric Cooperative |
| DEC➣Diamond Entertainment Corporation (video company) |
| DEC➣Defence Equipment Capability |
| DEC➣Drug Education Coordinator |
| DEC➣Dream Exotics Cars (French car club) |
| DEC➣Deductible Employee Contribution (US IRS) |
| DEC➣Drug Evaluation in Children |
| DEC➣Disease Endemic Country |
| DEC➣Digital Extended Command |
| DEC➣Defence Estates Committee |
| DEC➣Diamond Edge Communications |
| DEC➣Département d'Etudes des Combustibles (French: Department of Fuel Studies; Commissariat à l'Energie Atomique et aux Energies Alternatives) |
| DEC➣Department of Environmental Conventions |
| DEC➣Dingwall Evangelical Church (UK) |
| DEC➣DOE Environmental Checklist |
| DEC➣Disposable Enterics Card |
| DEC➣Data Equivalence Class |
| DEC➣Design Error Check |
| DEC➣Delta Executive Controller |
| DEC➣Dispersion Equalization Card |
| DEC➣Downhill Etc Crew (bike jumping group) |
Dec - the last (12th) month of the year