TTC
- General time- and transfer constant analysis
- TT pistol
- TTC (band)
- TTC Yangon
- Tao Te Ching
- Tatung Institute of Commerce and Technology
- Telecommunication Technology Committee
- Telford Town Centre
- Tendring Technology College
- Test-time compute
- Tetrazolium chloride
- Texas Technological College
- The Teaching Company
- The Tetris Company
- Top trading cycle
- Toronto Transit Commission
- Toyota TTC
- Tracking, telemetry, and control
- Trade and Technology Council
- Trans Thane Creek
- Trans-Texas Corridor
- Transbay Transit Center
- Transmission Technologies Corporation
- Transportation Technology Center
- Transportation and Ticket Center
- Trenton Transit Center
- Trident Technical College
- TrueType Collection
- Tulsa Technology Center