| Acronym | Definition |
|---|
| CET | Common Entrance Test |
| CET | Central European Time (GMT+0100) |
| CET | College of Engineering and Technology (Bhubaneswar, India) |
| CET | Compte Epargne Temps (French: Time Savings Account) |
| CET | Center for Educational Technologies |
| CET | Collège d'Enseignement Technique (French: College of Technical Education) |
| CET | Common External Tariff |
| CET | Companhia de Engenharia de Tráfego (Brazil) |
| CET | Centre d'Enfouissement Technique (French landfill) |
| CET | Cutting Edge Technology |
| CET | College English Test (China) |
| CET | Continuing Education and Training |
| CET | Computer Engineering Technology |
| CET | Center for Employment Training |
| CET | Cotisation Économique Territoriale (French: Economic Contribution Region) |
| CET | College of Engineering, Trivandrum (India) |
| CET | Certified Engineering Technologist (Canada) |
| CET | Certified Environmental Trainer (NETA) |
| CET | Combat Engineer Tractor |
| CET | Certified Electronic Technician |
| CET | Center for Environmental Therapeutics (New York, NY) |
| CET | Contraband Enforcement Team |
| CET | Cisco Encryption Technology |
| CET | Capacitance-Equivalent Thickness (computing) |
| CET | Combined Entrance Test |
| CET | Construction Electrician (Telecommunications) |
| CET | Center for Educational Telecommunications |
| CET | Cape Empowerment Trust |
| CET | Convoy Escort Team |
| CET | Corrected Effective Temperature |
| CET | Containment Event Tree |
| CET | Combat Enhancement Training |
| CET | Critical Entry Time |
| CET | Certified Environmental, Safety and Health Trainer |
| CET | Christian Education Trust (NZ) |
| CET | Contract voor de Economie en de Tewerkstelling |
| CET | Core Exit Thermocouple |
| CET | China Education Tours (Washington, DC) |
| CET | Contractual Engineering Task |
| CET | Centro de Estudes de Telecomunicoes (Portugal) |
| CET | Controlled Emission Toilet (safe hygienic disposal of contents of toilet tanks on railway carriages) |
| CET | Club Euro Trabi (French automobile club) |
| CET | Core Evaluation Team |
| CET | Centre Évolution Tuning (French automobile club) |
| CET | Certified Expressive Therapist |
| CET | Computer Ethics Taskforce (Australian Computer Society) |
| CET | Computers and Electronic Technology |
| CET | CINC Evaluation Test |
| CET | Commercial Experiment Transporter |
| CET | Critical Experiment Tank |
| CET | Cumulative Elapsed Time |
| CET | Crew Escape Technology |
| CET | Concurrent Engineering Team |
| CET | Certified Exercise Therapist |
| CET | Central Europe Trust Ltd. |
| CET | Centre d'Études Tchèques (French: Czechs Study Center; Belgium) |
| CET | Carrier Engineering Team |
| CET | Common Effluent Treatment Facilities |
| CET | Comprehensive Electronics Test |
| CET | Combined Environmental Testing Facility |
| CET | Customer Event Tracking |
| CET | Computational Engineering Team |
| CET | Collector-Emitter Transcapacitance |
| CET | Central Engineering Team |
| CET | Circular Equivalent Target |
| CET | Concept Evaluation Test |
| CET | Coherent Ensembles of Trajectories |
| CET | Control Equipment Technician |
| CET | Center for Environmental Technology (various locations) |
| CET | Christian Ethics Today (journal) |
| CET | Children's Educational Theater (Salem, OR) |
| CET | Center for Enabling Technology (various organizations) |
| CET | Center for Emerging Technologies (various organizations) |