TTS
- Audi TTS
- Auditory fatigue
- General Services Administration
- Girls' Generation-TTS
- T Tauri star
- Tabletop Simulator
- Taman Tasik Semenyih
- Tamil Nadu Theological Seminary
- Tanglin Trust School
- Tanker Transport Services BV
- Tarsal tunnel syndrome
- Telegraphic transfer
- Teletypesetter
- Text-to-speech
- Thomas Telford School
- Three-taxon analysis
- Thrombosis with thrombocytopenia syndrome
- Time translation symmetry
- Time-temperature superposition
- Toba Tek Singh
- Toba Tek Singh District
- Toba Tek Singh Tehsil
- Tower Transit Singapore
- Transaction Tracking System
- Transdermal patch