| Acronym | Definition |
|---|
| ATA | Advanced Technology Attachment (IDE Interface for IBM-PC/AT & compatible computers) |
| ATA | Addictions Training Academy (est. 2009; UK) |
| ATA | Air Transport Association |
| ATA | American Trucking Associations (Alexandria, Virginia) |
| ATA | Alberta Teachers' Association |
| ATA | American Translators Association |
| ATA | Analog Telephone Adapter |
| ATA | Actual Time of Arrival |
| ATA | American Taekwondo Association |
| ATA | Africa Travel Association |
| ATA | American Thyroid Association |
| ATA | Alternative Technology Association (Australia) |
| ATA | Antarctica (ISO Country code) |
| ATA | Aid to Artisans (Newtown, MA) |
| ATA | Agreement to Agree (contingent contract) |
| ATA | Alliance for Technology Access |
| ATA | Archery Trade Association (Salt Lake City, UT) |
| ATA | Allen Telescope Array |
| ATA | American Telemedicine Association |
| ATA | Approval to Award (California) |
| ATA | American Tinnitus Association |
| ATA | Amateur Trapshooting Association |
| ATA | Air-To-Air |
| ATA | Apples to Apples |
| ATA | Admission Temporaire (French: Temporary Admission) |
| ATA | ARCNET Trade Association |
| ATA | American Teleservices Association |
| ATA | Advanced Technology Attachment |
| ATA | Application Targeted Accelerator |
| ATA | Any to Any |
| ATA | anti Theft Alarm |
| ATA | Asynchronous Terminal Adapter |
| ATA | Automotive Technician Accreditation |
| ATA | Analog Trunk Adapter |
| ATA | Analog Terminal Adapter |
| ATA | Artists' Television Access (San Francisco, CA) |
| ATA | Animal Transportation Association (Warrenton, VA) |
| ATA | Anti-Terrorism Act |
| ATA | Atmospheres Absolute |
| ATA | American Tarot Association |
| ATA | Allegheny Trail Alliance |
| ATA | Accredited Tax Advisor (accreditation from College for Financial Planning and the Accreditation Council on Accountancy) |
| ATA | Albanian Telegraphic Agency (Albanian News Agency) |
| ATA | Application to Application |
| ATA | American Tennis Association |
| ATA | Aerospace Testing Alliance (Arnold AFB, TN) |
| ATA | American Topical Association |
| ATA | Association of Talent Agents |
| ATA | Associazione Tecnica dell'Automobile (Italy) |
| ATA | Antiterrorism Assistance (program) |
| ATA | American Trans Air, Inc. |
| ATA | Administrative Tribunals Act (Canada) |
| ATA | Aurintricarboxylic Acid |
| ATA | Auckland Transition Agency (New Zealand) |
| ATA | Atmosphere Absolute |
| ATA | Automatic Temperature Control |
| ATA | Air Travelers Association |
| ATA | American Trakehner Association |
| ATA | Afghan Transitional Authority |
| ATA | Automatic Tracking Aid (radar technology) |
| ATA | Applied Technology Associates |
| ATA | Advanced Tactical Aircraft |
| ATA | Alabama Turfgrass Association (est. 1961) |
| ATA | American Tilapia Association |
| ATA | American Telugu Association |
| ATA | Average Total Assets |
| ATA | Asia Theological Association |
| ATA | Aboriginal Tourism Association (British Columbia, Canada) |
| ATA | American Telecommuting Association |
| ATA | Alfabetico per Autore (Italian: Alphabetical by Author) |
| ATA | Agricultural Tenancies Act (UK) |
| ATA | Anterior Tibial Artery |
| ATA | Airlift Tanker Association (USAF) |
| ATA | Air Transportation Association of America |
| ATA | Airport Traffic Area |
| ATA | Air Transport Authority |
| ATA | American Tapestry Alliance |
| ATA | American Telemarketing Association |
| ATA | Auxiliary Ocean Tug |
| ATA | Association of Teaching Artists (New York) |
| ATA | Architecture Tradeoff Analysis |
| ATA | American Tailgaters Association |
| ATA | All Takashimaya Agency (Japan) |
| ATA | Access Tower (Vandenberg AFB, CA) |
| ATA | Army Technical Architecture |
| ATA | American Theatre Association |
| ATA | Alaska Telephone Association |
| ATA | Autonomous Target Acquisition |
| ATA | Associate of Technical Arts Degree (degree program) |
| ATA | Außergerichtlicher Tatausgleich (German: Act Reconciliation out of Court; Austria, Europe) |
| ATA | Alien Tort Act (also seen as ATCA, Alien Tort Claims Act) |
| ATA | Afghan Taekwon-Do Association (martial arts) |
| ATA | American Transit Association |
| ATA | Advanced Technology Academy |
| ATA | Advanced Technologies Academy (Las Vegas, NV) |
| ATA | Applied Technologies Associates (Paso Robles, CA) |
| ATA | Aspirin Tolerant Asthma |
| ATA | Advanced Technology Aircraft |
| ATA | American Tunaboat Association |
| ATA | Advanced Test Accelerator |
| ATA | American Target Advertising, Inc. |
| ATA | Annales de Toxicologie Analytique (French: Journal of Analytical Toxicology) |
| ATA | Automatic Trouble Analysis |
| ATA | Alliance Transport et Accompagnement (French: Alliance Transportation and Accompaniment) |
| ATA | Amino Triazole (organic compound) |
| ATA | Aviation Training Association |
| ATA | Alliance of Taiwan Aborigines (Taiwan) |
| ATA | Art Teachers Association |
| ATA | ANSI AT Attachment (PCMCIA cards) |
| ATA | Alcatel TITN Answare |
| ATA | Automotive Training Academy (American Financial & Automotive Services, Inc.) |
| ATA | Additional Training Assemblies |
| ATA | Automated Test and Analysis (various locations) |
| ATA | Anti Tank Artillery |
| ATA | Alberta Trucking Association |
| ATA | Adventure Training Award |
| ATA | Arkansas Telecommunications Association |
| ATA | Antenna Train Angle (fighter aircraft targeting) |
| ATA | Alliance Tours Airsoft (French airsoft club) |
| ATA | Association of independent Travel Agents |
| ATA | Audit Trail Analysis |
| ATA | American Tarentaise Association |
| ATA | Air Traffic Authority |
| ATA | Alternative Technologies and Approaches |
| ATA | Australian Telecommunications Authority |
| ATA | Associate Technical Aide |
| ATA | Automatic Threshold Adjustment |
| ATA | ATbus-Attachment (mobile version of IDE) |
| ATA | Analog Terminal and Access |
| ATA | Avionics Test Article |
| ATA | Air Tasking Authority |
| ATA | Accumulated Time Analysis |
| ATA | Authority to Advertise (US Army Corps of Engineers) |
| ATA | African Technical Association (South Africa) |
| ATA | Ateliers de Tôlerie de l'Atlantique (French autobody shop) |
| ATA | American Towing Alliance, Inc. (Upland, CA) |
| ATA | Automatic Terrain Avoidance |
| ATA | American TeledCommunications Alliance |
| ATA | Automated Testing Analyzer |
| ATA | Area Taxpayer Advocate (US IRS) |
| ATA | Automatic Testing Assertion |
| ATA | Automated Target Acquisition |
| ATA | Auto Técnica Alemana (Spanish, auto workshop) |
| ATA | Audit Trail Addendum |
| ATA | Auxiliary Timer Assembly |
| ATA | Activity Therapists Association (Chicago, IL) |
| ATA | Accredited Teacher Accomplishment (New South Wales Institute of Teachers; New South Wales, Australia) |
| ATA | Appropriation Transfer Account |
| ATA | Automatic Track Acquisition |
| ATA | Affordable Trooper Armor (Star Wars costume) |