| Acronym | Definition |
|---|
| ATS | American Thoracic Society |
| ATS | Applicant Tracking System |
| ATS | Advanced Technology Services (Peoria, IL) |
| ATS | Against The Spread (sports betting term) |
| ATS | Automatic Transfer Switch |
| ATS | Association of Theological Schools |
| ATS | Air Traffic Service(s) |
| ATS | Asian Test Symposium |
| ATS | Auxiliary Territorial Service |
| ATS | Alternative Trading System |
| ATS | Automated Targeting System |
| ATS | Amphetamine-Type Stimulants |
| ATS | Across the Street |
| ATS | Agri-Food Trade Service (Canada) |
| ATS | Alliance Theological Seminary (Nyack, NY) |
| ATS | Abstract Test Suite |
| ATS | Agence Télégraphique Suisse (Swiss National News Agency) |
| ATS | Austrian Shilling (former currency code; now EUR) |
| ATS | Antarctic Treaty System |
| ATS | Automated Trading System (Securities and Exchange Commission national market system plan) |
| ATS | Advanced Technology Systems |
| ATS | American Trauma Society |
| ATS | Air Traffic System |
| ATS | Automatic Test System |
| ATS | Asbury Theological Seminary (Wilmore, KY, Orlando, FL and online campus) |
| ATS | American Tract Society |
| ATS | Applied Technical Systems |
| ATS | Angel the Series (TV show) |
| ATS | Angel: The Series (TV show) |
| ATS | Advanced Training System |
| ATS | Automatic Train Stop (railways) |
| ATS | American Traffic Solutions, Inc. (Scottsdale, AZ) |
| ATS | Anti Terrorist Squad (India) |
| ATS | Applications Technology Satellite |
| ATS | Advanced Technical Support |
| ATS | Airport Transit System |
| ATS | Advanced Tissue Sciences (biotechnology) |
| ATS | Access to Space (NASA program) |
| ATS | Ayudante Técnico Sanitario |
| ATS | Administrative Terminal System (IBM software) |
| ATS | American Turkish Society |
| ATS | Assistive Technology Supplier (credential offered by Rehabilitation Engineering and Assistive Technology, RESNA) |
| ATS | Automatic Train Supervision (for rail signaling systems) |
| ATS | Advanced Thermal Solutions, Inc (Norwood, MA) |
| ATS | Across the Sea (Weezer song) |
| ATS | Aircrew Training System |
| ATS | Aviation Technical Services (SPAWAR, US Navy) |
| ATS | Automated Test System |
| ATS | Allowance Tracking System (air quality) |
| ATS | Average Time Spent (advertising) |
| ATS | Andersen-Tawil Syndrome |
| ATS | Agenzia Telegrafica Svizzera (Swiss National News Agency) |
| ATS | Apple Terminal Services |
| ATS | Advanced Turbine System |
| ATS | Automated Tracking System |
| ATS | Action Tracking System |
| ATS | Automatic Trading System |
| ATS | Advanced Transportation Systems |
| ATS | Advanced Technology Satellite |
| ATS | Applicant Testing Services (London, ON, Canada) |
| ATS | Air Transport Squadron |
| ATS | Attendance Tracking System |
| ATS | Automatic Targeting System |
| ATS | Abusive Tax Shelter |
| ATS | Application Test Suite (Novell) |
| ATS | Available to Ship |
| ATS | Amphetamine Type Substance |
| ATS | Adaptive Tape Speed |
| ATS | Automatic Transmission System |
| ATS | Account Technology Specialist |
| ATS | Approval to Start |
| ATS | Air Turbine Starter |
| ATS | Alport Syndrome, X-Linked |
| ATS | Audit Tracking System |
| ATS | Adapting to Scale |
| ATS | Autotransfusion System |
| ATS | Average Travel Speed (highway capacity, civil engineering) |
| ATS | Applied Technology Satellite |
| ATS | Automatic Throttle System |
| ATS | Automated Transport System |
| ATS | Arterial Tortuosity Syndrome |
| ATS | Athens Transit System (Athens, GA) |
| ATS | Absolute Time Sequence |
| ATS | American Trudeau Society (now American Thoracic Society) |
| ATS | Aeronautical and Technical Services (Canada; Mapping Services Branch) |
| ATS | Acceptance Test Specification |
| ATS | Assignment Tracking System |
| ATS | At the Suit of (legal documents) |
| ATS | Auto Technisches Spezialzubehör |
| ATS | Advanced Telemetry System |
| ATS | Average Transaction Size |
| ATS | Analytic Trouble Shooting |
| ATS | American Temperance Society |
| ATS | Automated Travel System |
| ATS | Adult Thumb Sucking |
| ATS | Adherence to Schedule (logistics) |
| ATS | Anomaly Tracking System |
| ATS | Angry Tradewind Survival (Magic: The Gathering Legacy Deck Archetype) |
| ATS | Automated Technical Systems (Windsor, ON, Canada) |
| ATS | Automated Timekeeping System |
| ATS | Acquisition Tracking System |
| ATS | Authorization to Ship |
| ATS | Antitetanic Serum |
| ATS | Salvage & Rescue Ship |
| ATS | Automatic Traffic Signals |
| ATS | Accelerator Test Stand |
| ATS | Aeronautical Telecommunications Services |
| ATS | Advanced Tactical Support |
| ATS | Airman Training School |
| ATS | Assigned Time Slot |
| ATS | Advanced Transport System |
| ATS | Agilent Technologies Singapore |
| ATS | Apprentice Training School |
| ATS | Advanced Tracking System (AN/GYQ-51; USAF radar data processor) |
| ATS | Automated Telemetry System |
| ATS | Assault Terror SWAT (gaming clan) |
| ATS | Athene Tactical System (Canadian Land Force Command and Control application) |
| ATS | Agreed Time Scale |
| ATS | Automated Tuning System |
| ATS | Analog Test Station |
| ATS | Application Tuning System |
| ATS | Automatic Tray Sleever (US Postal Service) |
| ATS | assign terminal service (US DoD) |
| ATS | Automated Tasking System |
| ATS | Afloat Telecommunications Service |
| ATS | Advanced Threat Simulator |
| ATS | Automated Training System |
| ATS | Ascension Tracking Station |
| ATS | Annual Training Site |
| ATS | Automated Test Setup |
| ATS | Applications Test Satellite |
| ATS | Academic Trainer System |
| ATS | Attitude Transfer System |
| ATS | Air Time Sales (advertising/broadcast industry) |
| ATS | Aerothermal Structure |
| ATS | American Television Society |
| ATS | Administrator's Tracking System (EPA) |
| ATS | Active Thermal System |
| ATS | Army Training Strategy |
| ATS | Automatic Transfer Stand |
| ATS | Alternate Termination Sequence (AT&T) |
| ATS | Assembly Truss Structure |
| ATS | Army Telecommunications System |
| ATS | Acquisition Track Sensor |
| ATS | Agency Training System |
| ATS | Army Topographic Station |
| ATS | Ammunition Tracking System |
| ATS | Automatic Telecommunication System |
| ATS | Aquatic Therapy Symposium |
| ATS | Action Tracking Strategy |
| ATS | Adaptive Troubleshooting System |
| ATS | Alternative Test System |
| ATS | Amphibious Tracking System |
| ATS | Atlantic Test Site |
| ATS | Army Test Site |
| ATS | Automated Terminal System |
| ATS | Accounting Terminal System |
| ATS | Anti-terrorist Swat (gaming clan) |
| ATS | Associated Transcription Services, Inc |
| ATS | Alltel Technology Services |
| ATS | Anti-Theft Status (signal) |
| ATS | Automatic Test Sets |
| ATS | Automatic Trip Stop (rail systems signaling system) |
| ATS | Asil Technical Services |
| ATS | AMDCCS Tactical Support |
| ATS | Anterior Teeth Selection |
| ATS | Auto Transformer Starting |
| ATS | Applications Technologies Systems |
| ATS | Alarm Termination Subsystem |
| ATS | Automated Test Sets |
| ATS | Automatic Trunk Synchronizer |
| ATS | Automated Test Scheduler |
| ATS | AHLTA Training System |
| ATS | Terminal System Availability |
| ATS | Adaptive Tactics Server (programming) |
| ATS | Automatic Torque System |
| ATS | Automatic Telex System |
| ATS | Applique Traceability System |
| ATS | Advanced Transportation Services, Inc (Visalia, CA) |