| Acronym | Definition |
|---|
| ATR➣Americans for Tax Reform |
| ATR➣Average True Range (financial indicator) |
| ATR➣At the Races |
| ATR➣Automatic Target Recognition |
| ATR➣Attribute |
| ATR➣Alton Towers Resort |
| ATR➣Ability-to-Repay (lending) |
| ATR➣Access to Recovery (US DHHS) |
| ATR➣Acceso de Terceros a la Red (Spanish: Third Party Access Network) |
| ATR➣Attenuated Total Reflection |
| ATR➣Attenuated Total Reflectance |
| ATR➣Autothermal Reforming (syngas generation) |
| ATR➣Answer to Request |
| ATR➣Avions de Transport Regional (turboprop aircrafts) |
| ATR➣Atari Teenage Riot (band) |
| ATR➣All That Remains (band) |
| ATR➣Atlantic Test Range (US Navy) |
| ATR➣Atmore (Amtrak station code; Atmore, AL) |
| ATR➣Automatic Traffic Recorder |
| ATR➣Aft Torpedo Room |
| ATR➣Adaptive Transformation |
| ATR➣Aerei da Trasporto Regionale (French-Italian aircraft manufacturer; Blagnac, France) |
| ATR➣Akademia Techniczno Rolnicza (Polish: University of Technology and Agriculture) |
| ATR➣Advanced Telecommunications Research Institute International |
| ATR➣Asphalt Tango Records (Germany) |
| ATR➣Answer to Reset |
| ATR➣Registered Art Therapist |
| ATR➣Anthrax Toxin Receptor (proteins) |
| ATR➣Advanced Test Reactor |
| ATR➣Above the Rim (Reebok) |
| ATR➣Air Transportation Regulations (Canada) |
| ATR➣Ataxia Telangiectasia and Rad3-related |
| ATR➣Agir pour un Tourisme Responsable (French: Acting for Responsible Tourism; tourism association) |
| ATR➣Above the Rest |
| ATR➣Action Taken Report |
| ATR➣Attrition Reserve (US DoD) |
| ATR➣Assessment and Test Report (International Electrotechnical Commission) |
| ATR➣African Traditional Religion |
| ATR➣Air Transport Rack |
| ATR➣Achilles Tendon Rupture |
| ATR➣Anti-Tank Rifle |
| ATR➣Advanced Tongue Root (phonetics) |
| ATR➣Articulated Tail Rotor (aviation) |
| ATR➣Audio Tape Recorder |
| ATR➣Aided Target Recognition |
| ATR➣All Terrain Racing |
| ATR➣Art Therapist Registered (Art Therapy Credentials Board) |
| ATR➣Analog Tape Recorder |
| ATR➣Automatic Thrust Restoration (aircraft) |
| ATR➣Automatic Terminal Recognition |
| ATR➣Alliance for Transportation Research |
| ATR➣Annual Traffic Report (various locations) |
| ATR➣Agency Technical Review (US DoD) |
| ATR➣Autonomous Target Recognition |
| ATR➣Accord Type R (Honda Europe) |
| ATR➣Acceptance Test Report |
| ATR➣All Tech Related (website) |
| ATR➣Advance Tax Ruling (South Africa) |
| ATR➣A Territory Resource |
| ATR➣Action for Tinnitus Research |
| ATR➣Advanced Time Report (project management) |
| ATR➣Association Technique de la Route (French: Technical Association of the Road) |
| ATR➣Authorization to Return |
| ATR➣Air Turbo Ramjet |
| ATR➣Amicale du Tracteur Renault (French: Friends of Renault Tractor; est. 1997) |
| ATR➣Apollo Token Ring |
| ATR➣Alaska Trauma Registry |
| ATR➣Alternate Trunk Routing |
| ATR➣Arizona Trail Riders (Motorcyclists) |
| ATR➣Air Turbo Rocket |
| ATR➣Against-The-Rule Astigmatism |
| ATR➣Above Top of Rail |
| ATR➣Acceptance Test Review |
| ATR➣All Thread Rod |
| ATR➣Austin Trumbull Radio (ARINC) |
| ATR➣Air Traffic Requirements |
| ATR➣Advanced Tactical Radar |
| ATR➣As They Rise (kiln-fired brick; UK) |
| ATR➣Ambient Temperature Recorder |
| ATR➣Ammunition Transaction Report |
| ATR➣Air Transport Rating |
| ATR➣Assistance for Trade Reform |
| ATR➣American Technology Research, Inc |
| ATR➣Authority to Recruit |
| ATR➣Air Traffic Regulations |
| ATR➣Aviation Training Relocation (US Air Force and Japanese Air Self Defense Force) |
| ATR➣Available to Reserve (manufacturing) |
| ATR➣Antitransmit Receive |
| ATR➣All Terminal Reliability |
| ATR➣Awareness, Trial, Repeat |
| ATR➣Answering Time Recorder |
| ATR➣Agency Technical Representative |
| ATR➣Assistant Technical Representative |
| ATR➣Approved Tank Requirements |
| ATR➣Agency Telecommunications Representative |
| ATR➣Admission Temporaire Roulette (Customs Documentation, Turkey) |
| ATR➣Augmented Tree-Based Routing |
| ATR➣Australian Technology Resources |
| ATR➣Airline Transport Rack |
| ATR➣Above Threshold Reporting |
| ATR➣Annual Technology Report |
| ATR➣Agency Telecommunications Request |
| ATR➣Aviation Transport Rack |
| ATR➣Anti-Terrorism Representative (various companies) |
| ATR➣Acceptance of TEMPEST Risk |
| ATR➣Advice to Receive (electronic payment processing) |
| ATR➣Automatic Trouble Reporting |
| ATR➣Aerial Target Review |
| ATR➣Applied Tariff Rate |
| ATR➣Air Transit Route |
| ATR➣Automated Transaction Report |
| ATR➣Anti-Theft Request (signal) |
| ATR➣Anti-Time Reaction (Star Trek) |
| ATR➣Authorized Traffic Request |
| ATR➣All Type Racer VW (Volkswagen) Club (French automobile club) |
| ATR➣Aviation Electronics Technician Radar and Radar Nav Equipment (US Navy) |
| ATR➣Alltech Recycling, Inc (Fort Worth, TX) |
| ATR➣Animal Technician, Registered |