TEC
- Costa Rica Institute of Technology
- I.G. Brown Air National Guard Training and Education Center
- Monterrey Institute of Technology and Higher Education
- Nechama Tec
- Roland Tec
- SV TEC
- TEC (gene)
- TEC-9
- TRACE Expert City
- Tasmanian Electoral Commission
- Tec (album)
- Tech (river)
- Technician fifth grade
- Technician fourth grade
- Technician third grade
- Telecommunication Engineering Centre
- Terik language
- Tertiary Education Commission (disambiguation)
- Texas Eastern Conference
- The Episcopal Church
- Thermoelectric cooler
- Threshold Exceeds Condition
- Time error correction
- Topographic Engineering Center
- Toshiba TEC Corporation
- Total electron content
- Tower en route control
- Training and enterprise council
- Transatlantic Economic Council
- Transient erythroblastopenia of childhood
- Transitional Executive Council
- Transport En Commun
- Treaty establishing the European Community
- Trichy Engineering College
- Tsunami Evaluation Coalition
- Turkish Engine Center