| Acronym | Definition |
|---|
| TEC | Technology |
| TEC | The Episcopal Church |
| TEC | Texas Education Code |
| TEC | Teens Encounter Christ (Catholic Youth Retreat) |
| TEC | Tertiary Education Commission |
| TEC | Tri-County Electric Cooperative (Minnesota) |
| TEC | Technology Evaluation Center |
| TEC | Typical Electricity Consumption (Energy Star Test Method) |
| TEC | Tarifa Externa Comum (Portugese: External Common Tariff) |
| TEC | The Electric Company (TV show) |
| TEC | Total Electron Content |
| TEC | Thermoelectric Cooling |
| TEC | Tivoli Enterprise Console |
| TEC | Thermo-Electric Cooler |
| TEC | Topographic Engineering Center |
| TEC | Technical Excellence & Creativity (Award) |
| TEC | Thermal Engineering Corporation |
| TEC | Transatlantic Economic Council (Transatlantic Business Dialogue) |
| TEC | Texas Employment Commission |
| TEC | Training and Enterprise Council |
| TEC | Technical Evaluation Committee |
| TEC | Texas Electric Cooperatives, Inc. |
| TEC | Transitional Executive Council |
| TEC | Total Estimated Cost |
| TEC | Telecom Engineering Centre (India) |
| TEC | Transient Erythroblastopenia of Childhood |
| TEC | Test and Evaluation Center |
| TEC | Thymic Epithelial Cell |
| TEC | Technology Enhanced Classroom (education) |
| TEC | [not an acronym] (formerly Tokyo Electric Co., Ltd.; as in Toshiba TEC Corporation) |
| TEC | Tanzania Episcopal Conference (Christianity) |
| TEC | Transluminal Extraction Catheter |
| TEC | Travel Expense Claim |
| TEC | Traffic Engineering Control |
| TEC | Technologies de l'Entreprise Communicante (French: Technology Communications Company; France) |
| TEC | The Elongated Collectors (pressed elongated souvenir pennies) |
| TEC | Telescope Engineering Company (Golden, CO; est. 1994) |
| TEC | Taxpayer Education and Communication |
| TEC | The Engineers’ Club |
| TeC | Team Eclipse (gaming clan) |
| TEC | Treaty of the European Community |
| TEC | Tunnel Engineering Consultants (Netherlands) |
| TEC | Technology for Energy Corporation (Knoxville, TN) |
| TEC | Turbine Exhaust Case |
| TEC | Transportation Equipment Cleaning (regulations; US EPA) |
| TEC | Transmit Error Counter (computer networking) |
| TEC | Type Examination Certificate |
| TEC | Traditional Episcopal Church |
| TEC | Thermionic Energy Conversion |
| TEC | The Environmental Company, Inc (Annapolis, MD) |
| TEC | Type Equipment Code |
| TEC | Training Extension Course |
| TEC | Transearth Coast |
| TEC | The Elite Connection (gaming clan) |
| TEC | Total Excellence Centre (Manchester, UK) |
| TEC | Tower En-route Control |
| TEC | Tennessee Eastman Corporation |
| TEC | Thyroid Epithelial Cell |
| TEC | Territorial Electoral Commission (Russian Federation) |
| TEC | Threshold Effects Concentration |
| TEC | Teens Erleben Christus (German) |
| TEC | Tactical ELINT Correlator |
| TEC | Terna Engineering College (India) |
| TEC | The Elite Clan (Counter-Strike clan) |
| TEC | Total Entertainment Center (video rental store) |
| TEC | Threshold Exceeds Condition |
| TEC | Temporal Error Concealment |
| TEC | Training Equipment Center |
| TEC | Test Execution Control |
| TEC | Tibet Empowerment Circle (nonprofit NGO supporting education and empowerment for Tibetans) |
| TEC | TRICARE Executive Committee |
| TEC | Thermal Electric Control |
| TEC | Temporary Engineering Change |
| TEC | Teaching Energy Conservation |
| TEC | Triple Error Correction |
| TEC | TOSS Exchange Center |
| TEC | Test Environment Certification |
| TEC | Trace Elements Corporation |
| TEC | Training Exercise Coordinator |
| TEC | Test & Experimentation Center |
| TEC | Temporal Energy Constraint |
| TEC | Taxpayer Education and Counseling |
| TEC | Technical Environment Control, Incorporated |
| TEC | Time-Domain Echo Cancellation |
| TEC | Tasa de Eventos de Control (Spanish) |
| TEC | Tokai Electronic(s) Company |
| TEC | Total Elementary Carbon (solid wastes) |
| TEC | Thereapeutic Equestrian Center (Holyoke, MA) |
| TEC | Teacher Education Council (various locations) |
| TEC | Training and Education Center (various organizations) |
| TEC | Traffic Enforcement Centre (UK) |
| TEC | Transportation Engineering Council (North Carolina) |
| TEC | Trinity Episcopal Church (various locations) |
| TEC | Triethyl Citrate |
| TEC | Transport and Environment Committee (UK) |
| TEC | Teaching Excellence Center (various schools) |
| TEC | The Experts Conference (computing) |
| TEC | The Education Committee (various locations) |