| Acronym | Definition |
|---|
| TAS | Tasmania (Australian State) |
| TAS | The Animated Series (Star Trek) |
| TAS | The Absolute Sound (online journal) |
| TAS | Transaction Advisory Services |
| TAS | Taxpayer Advocate Service |
| TAS | Tribunal Arbitral du Sport (French: Court of Arbitration for Sport) |
| TAS | Tuition Assurance Scheme (Australia) |
| TAS | The American Spectator (magazine) |
| TAS | The Actors Studio |
| TAS | Test-And-Set (CPU instruction) |
| TAS | True Air Speed (aviation) |
| TAS | The Armidale School (NSW, Australia) |
| TAS | Telephone Answering Service |
| TAS | Texas Accessibility Standards |
| TAS | Texas Archeological Society |
| TAS | Taipei American School |
| TAS | Traffic Advisory System (aviation) |
| TAS | Target Acquisition System |
| TAS | Turbine Air Systems |
| TAS | Tactical Airlift Squadron |
| TAS | Technical Advisory Service (Asia-Pacific Broadcasting Union) |
| TAS | The American Statistician (journal) |
| TAS | Towed Array Sonar (Naval application) |
| TAS | Teacher At Sea (NOAA program) |
| TAS | Technical Assistance Service (Nortel) |
| TAS | Tactical Air Support |
| TAS | The Amber Spyglass (Phillip Pullman book) |
| TAS | Triathlon Association of Singapore |
| TAS | Trinity Anglican School (Australia) |
| TAS | Tennessee Academy of Science |
| TAS | Telephony Application Server |
| TAS | The Applique Society |
| TAS | Tacoma Astronomical Society (Washington) |
| TAS | Tool-Assisted Speedruns |
| TAS | Tropical Audubon Society |
| TAS | Texas Astronomical Society |
| TAS | Transport Automation Solutions (Alcatel) |
| TAS | The Army Staff |
| TAS | Trade Automation Service (DHL program) |
| TAS | Terrain Analysis System |
| TAS | Total Analytical System |
| TAS | Tactical Adjustment System |
| TAS | Test Access System |
| TAS | Timeline Analysis System |
| TAS | Tashkent, Uzbekistan - Tashkent (Airport Code) |
| TAS | Tolerance Assessment System |
| TAS | Tentamen-Aanmeld-Systeem (Dutch) |
| TAS | Telomere-Associated Sequence |
| TAS | Toxic Anger Syndrome |
| TAS | Tenants Advice Service Inc |
| TAS | Tool Accountability System |
| TAS | Team Aquatic Supplies |
| TAS | The Accounting Solution |
| TAS | Trade, Aid and Security |
| TAS | Theatre Amplifier Standard |
| TAS | Taiwanese American Society |
| TAS | Transportation Annual Survey |
| TAS | Towed Array System |
| TAS | Training Advisory Service |
| TAS | Treasury Agency Symbol |
| TAS | Technology Application Support (Cisco) |
| TAS | Tenders Alert Service (Egypt) |
| TAS | Tactical Automatic Switch |
| TAS | Terminal Access System |
| TAS | Transfer Articulation Services |
| TAS | Tactical Airsoft Supply (Salt Lake City, UT) |
| TAS | Tahquamenon Area Schools (Newberry, MI) |
| TAS | Tactical Atmospheric Summary |
| TAS | Transportes Aéreos Salvador (Brazilan airline) |
| TAS | Trouble Administration System |
| TAS | Time-After-Silence |
| TAS | Time Analysis System (FAS) |
| TAS | Technical Assistance Subcontractor |
| TAS | Teleaction Systems (Ascom) |
| TAS | Tactical Sonobuoy (Decision Aid) |
| TAS | Theater Augmentation Set |
| TAS | Terminating AT&T Switch |
| TAS | Technical Assisted Support |
| TAS | Target Acquisition Simulator |
| TAS | Terminating AT&T Switch (4ESS network) |
| TAS | Thermal Asperity Count (reliability) |
| TAS | Tutorial and Assessment System |
| TAS | Telecom Analysis System (Agilent) |
| TAS | Technical Analysis Sheet |
| TAS | Time Arrived on Station |
| TAS | Tactical ASW Sonar (Decision Aid) |
| TAS | Transportation Addressing System |
| TAS | Theater Addressing Subsystem |
| TAS | Tactical Aircraft Survivability |
| TAS | Tactical Arctic Sonobuoy |
| TAS | Torpedo and Anti-Submarine Warfare (British Royal Naval) |
| TAS | Trans-Admittance Stage |
| TAS | Tactical Air-automated System |
| TAS | Task Objective Statement |
| TAS | Transfer Agent System (financial industry) |
| TAS | Transfer Accountability System |
| TAS | Tutorial Allocation System |
| TAS | Transatmospheric Aeronautical System |
| TAS | Trunk Assignment System (Bellcore) |
| TAS | Total Aviation Squadron |
| TAS | Triumph Accessory Services (Grand Paririe, TX) |
| TAS | Training Aids System |
| TAS | Team Apache System |
| TAS | Tutorial Assistant Subgrant |
| TAS | Transaction Access Network |
| TAS | Tool Accountability Software |
| TAS | Taipa Area School (New Zealand) |
| TAS | The Atlas Society (Washington, DC) |
| TAS | Transition Assistance Services (Texas) |
| TAS | Tokyo Auto Salon (Japan) |
| TAS | The American Scene |
| TAS | Treatment in the Same Manner as a State (US EPA) |
| TAS | Terminal-Analog Synthesizer (speech synthesizer research tool) |
| TAS | Thales Alenia Space (satellite systems; France) |
| TAS | Take a Shot (photography) |
| TAS | Targeted Assistance School |