| Acronym | Definition |
|---|
| TSS | Total Suspended Solids |
| TSS | Toxic Shock Syndrome |
| TSS | Transcription Start Site |
| TSS | Total System Services, Inc. |
| TSS | Technology Support Services |
| TSS | Time Stamp Server |
| TSS | The Screen Savers (TechTV show) |
| TSS | Technical Support Services (IT department) |
| TSS | Time Sharing System |
| TSS | Tethered Satellite System |
| TSS | Task State Segment |
| TSS | Therapeutic Staff Support |
| TSS | Traffic Separation Scheme |
| TSS | timesharing system (US DoD) |
| TSS | Technical Support Specialist |
| TSS | Technical Support Staff |
| TSS | Telecommunication Standardization Sector (ITU-T) |
| TSS | Three-Step Search |
| TSS | Top Secret Security (CA-Top Secret) |
| TSS | Target Sight System |
| TSS | Training Support System |
| TSS | The Stetchkov Syndicate (game) |
| TSS | Turner's Syndrome Society |
| TSS | The Sonic Stadium |
| TSS | Terminology Summer School |
| TSS | Thermal Synthesizer System |
| TSS | Trondhjems Studentersangforening |
| TSS | Test Suite Specification |
| TSS | Total Standard Spending (UK) |
| TSS | New York, NY, USA - East 34Th Street Heliport (Airport Code) |
| TSS | Turbine Steam Ship |
| TSS | Tangential Signal Sensitivity |
| TSS | Time-Shared System (IBM) |
| TSS | Time Shared System |
| TSS | Topographic Support System |
| TSS | Trunk Servicing System (Bellcore) |
| TSS | Turbine Speed Sensor |
| TSS | Tower Simulator System (Air Traffic Control tower training system) |
| TSS | Thornhill Secondary School (Ontario, Canada) |
| TSS | Test Support Squadron (USAF) |
| TSS | Thermal Sight System |
| TSS | Transported Stock Statement (Australia) |
| TSS | The Secret Saturdays (Cartoon) |
| TSS | Textron Six Sigma (mean management) |
| TSS | The Seventh Sign |
| TSS | Training Systems Squadron |
| TSS | Tidewater Soaring Society (Garner Airport, Isle of Wight, VA) |
| TSS | Target Sensing Systems |
| TSS | Target Selection Standards |
| TSS | Telecommunications Switching System |
| TSS | Territory Sales Supervisor |
| TSS | Terminal Security System |
| TSS | Traffic Separation Study |
| TSS | Trunk and Signaling Subsystem |
| TSS | time signal set (US DoD) |
| TSS | Telephony Softswitch Solution |
| TSS | Timesharing Subsystem |
| TSS | Twin Screw Steamship |
| TSS | Train Service Supervisor (NYC Transit Authority) |
| TSS | Tyre Safety System |
| TSS | Tactical Switching System |
| TSS | Time Synchronization Server (University of Delaware) |
| TSS | Trim, Stress and Stability |
| TSS | Tactical Shelter System |
| TSS | traffic service station (US DoD) |
| TSS | Tri-band SATCOM Subsystem |
| TSS | Transmission Surveillance System (Sprint) |
| TSS | Training System Software |
| TSS | Tradeoff Study Suggestion |
| TSS | Tactical Surveillance Sonobuoy |
| TSS | TRMM Support System |
| TSS | Telephone Service Survey (Sprint) |
| TSS | Técnicas y Sistemas de Seguridad (Guatemala security agency) |
| TSS | Theater Sustainment Stocks (US DoD) |
| TSS | Tactical Software Support |
| TSs | The Southport School for Boys (Gold Coast, Australia) |
| TSS | Transportation Safety System |
| TSS | thermally-dried sewage sludge (also seen as TDSS) |
| TSS | Tactical Strike System |
| TSS | Tactical System Software |
| TSS | Telecommunications Security System |
| TSS | Tallebudgera State School (Gold Coast, Australia) |
| TSS | The Stuyvesant Standard (student newspaper of Stuyvesant High School, New York City) |
| TSS | TAPS Support Structure |
| TSS | Test/Topographic Support System |
| TSS | TAFE Scholarship Scheme (NSW Australia) |
| TSS | Tactical System Simulator |
| TSS | Tactical SIGINT Support/System |
| TSS | Tear Sheet Server |
| TSS | Triceps and Shoulder Stretch (stretching exercise) |
| TSS | Timing and Synchronization System (air traffic management) |
| TSS | Tactical Satellite Support |
| TSS | Telecommunications Segment Specification |
| TSS | Test Station Synchronization |
| TSS | Test System Shell (NCC) |
| TSS | Technical Security System |
| TSS | Tritium Separation System |
| TSS | Target SIGINT System |
| TSS | Trident Support Site |
| TSS | Tracked Suspension System |