| Acronym | Definition |
|---|
| TCS | Tata Consultancy Services |
| TCS | Traction Control System |
| TCS | Theoretical Computer Science |
| TCS | Taxpayers for Common Sense |
| TCS | Tech Central Station |
| TCS | Trinity Christian School (Montville, New Jersey) |
| TCS | Touring Club Suisse |
| TCS | Train Control System |
| TCS | Transactions on Computer Systems |
| TCS | Troop Carrier Squadron |
| TCS | Total Customer Satisfaction |
| TCS | Trinity College School (Port Hope, Ontario private elementary and high school) |
| TCS | Thermal Control System |
| TCS | Temporary Change of Station (federal employee relocation) |
| TCS | Traffic Control System |
| TCS | Telecommunication System |
| TCS | Triclosan (2,4,4'-Trichloro-2'-Hydroxydiphenyl Ether) |
| TCS | Treacher Collins Syndrome |
| TCS | Television Corporation of Singapore |
| TCS | Trusted Computer System |
| TCS | Telescope Control System (astronomical observatory) |
| TCS | Traffic Control Supervisor |
| TCS | Texas Chainsaw Massacre (movie) |
| TCS | Telecommunications Association |
| TCS | Teaching Company Scheme |
| TCS | The Container Store |
| TCS | Test of Cognitive Skills |
| TCS | Tejido Celular Subcutáneo (Spanish: Subcutaneous Cellular Tissue) |
| TCS | Toll Collection System (transportation) |
| TCS | Transactions on Circuits and Systems (IEEE) |
| TCS | Telecommunications Systems inc |
| TCS | Thermal Control Subsystem |
| TCS | Tax Collected At Source (India) |
| TCS | The Coastal Society |
| TCS | Transmission Convergence Sublayer (ATMF) |
| TCS | Threaded Case Study |
| TCS | Treasury Communications System |
| TCS | Temple Christian School (Ventura, CA, USA) |
| TCS | The College School (St. Louis, MO) |
| TCS | Turbine Control System |
| TCS | Terascale Computing System |
| TCS | Tactical Control Squadron (US Air Force) |
| TCS | The Children's Society (UK charity) |
| TCS | Television Camera System (Stephen Coonts in Final Flight) |
| TCS | Telephony Control Specification |
| TCS | Transaction Code Sets |
| TCS | The Cousteau Society |
| TCS | Terminal Control System |
| TCS | Time Critical Strike |
| TCS | Touring Club of Switzerland |
| TCS | Total Cross Section |
| TCS | Topical Corticosteroid (pharmaceutical medication) |
| TCS | Television Camera Set (US Navy aviation) |
| TCS | The Company Software (Sevierville, TN) |
| TCS | Trajectory Control Sensor |
| TCS | Translation Confinement and Sustainment |
| TCS | T-Carrier Crossconnect System |
| TCS | Toxicology and Chemical Substances (EU) |
| TCS | Tivoli Centralized Security Console (Sprint) |
| TCS | Touch Control Steering |
| TCS | TeleCenter System (call center software by TCS Management Group, Inc.) |
| TCS | Trip Circuit Supervision (power system protection) |
| TCS | Tennessee Cave Survey |
| TCS | Tele Corporación Salvadoreña (San Salavador, El Salvador) |
| TCS | Transnational Civil Society |
| TCS | Time Constrained Search |
| TCS | Tunnel Control System (trains) |
| TCS | Transformational Communications Study |
| TCS | Tri-City Storm (Kearney, Nebraska hockey) |
| TCS | The Cycad Society |
| TCS | Thermal Conductivity Sensor (measurement device) |
| TCS | The Chennai Silks (Tamilnadu, India) |
| TCS | Tower Communications System |
| TCS | Telephone Communications System |
| TCS | Test and Control System |
| TCS | Theater Communications System |
| TCS | Transport Conversion School (Pakistan Air Force) |
| TCS | Terminal Command String |
| TCS | Tokyo Counseling Service |
| TCS | Task, Condition, Standard (military training) |
| TCS | Too Close to See |
| TCS | Telemetry & Command Subsystem |
| TCS | Terran Confederation Ship |
| TCS | Techconsult Salzburg |
| TCS | The Clique Series (books) |
| TCS | Transdermal Contraceptive System |
| TCS | Tonbridge Civic Society (UK) |
| TCS | Transaction Context Server |
| TCS | Transport Control Subsystem (Nortel) |
| TCS | Thermoplastic Comfort Systems, Inc (Signal Hill, CA dental equipment) |
| TCS | Trinity Classical School (Houston, TX) |
| TCS | Technology Communication & Supplies (Pakistan cargo company) |
| TCS | Target/Talent Control System |
| TCS | Test Control and Status |
| TCS | Toilet Cleaning Service |
| TCS | Terrestrial Coordinate System |
| TCS | Technical Control Station |
| TCS | Theater Air Defense Counter-Air System |
| TCS | Temporary Criticality Specifications |
| TCS | Total Colloidal Solids |
| TCS | The Consultants Source (Oak Park, IL) |
| TCS | Thin Conductive Sheet |
| TCS | Tillotson Computers & Services (Kearney, NB) |
| TCS | Tranzum Courier Service (Pakistan) |
| TCS | Technical Customer Service (various organizations) |
| TCS | Tactical Command System |
| TCS | Technology and Computing Services (various organizations) |
| TCS | Transylvania County Schools (North Carolina) |
| TCS | The Camera Store (various locations) |
| TCS | Tactical Control Station |
| TCS | Technical Customer Support (various organizations) |
| TCS | Team Centric Software (Germany) |
| TCS | Tuscaloosa City Schools (Tuscaloosa, AL) |
| TCS | The Crystal Star (Star Wars book) |
| TCS | Technology, Commerce, Society (online magazine) |
| TCS | Tetrachlorosilane |
| TCS | Three-Dimensional Complex Space Theory |
| TCS | Technical Communication Services, Inc (Kansas City, MO) |
| TCS | Tactical Cryptologic System |
| TCS | Telecommunications Service |
| TCS | Tacit Cache Server (Tacit Networks) |
| TCS | The Citizen Scientist (journal) |
| TCS | Transparent Cache Switching (computer networking) |
| TCS | Tinkoff Credit Systems |
| TCS | Taking Children Seriously (educational philosophy) |
| TCS | Tactical Control System |
| TCS | Trichlorosilane (chemical compound) |
| TCS | Tactical Computer System |
| TCS | Tactical Communications System |
| TCS | Table Control System (Sprint) |