TSS
- Space tether missions
- Space tether missions
- Surge protector
- TATSU Signing Server
- TSS (operating system)
- Tanglin Secondary School
- Task State Segment
- Technical Services Staff
- Telangana Sports School
- Television Shin-Hiroshima
- Texas Supernova Search
- The Southport School
- Thornhill Secondary School
- Tiangong Space Station
- Tideway Scullers School
- Times Square Stores
- Tinana State School
- Ton Steine Scherben
- Total System Services, Inc.
- Total sum of squares
- Total suspended solids
- Toxic shock syndrome
- Toyota Safety Sense
- Traffic Separation Scheme
- Trans Semanggi Suroboyo
- Transcription start site
- Tromsø Satellite Station
- Trusted Platform Module
- Tsing Shan Tsuen stop
- Twin-screw steamer