| Abbreviation | Definition |
|---|---|
| ATP | Autotransformer Thermal Protection |
| ATP | Adenosine TriPhosphate |
| ATP | Attending physician |
| ATP | Air Transport Pilot |
| ATP | Accelerated Training Program |
| ATP | Acceptance Test Procedure |
| ATP | Alternative Transient Program |
| ATP | Approved Training Provider |
| ATP | Advanced Technology Program |
| ATP | Airline Transport Pilot |
| ATP | Appletalk Transaction Protocol |
| ATPCO | Airline Tariff Publishing Company |
| ATPG | Automatic Test Pattern Generation |
| ATPS | Atmospheric, Temperature, Pressure, Saturated |
| ATR | Answer To Reset |
| ATR | Achilles tendon reflex |
| ATR | Atrophy |
| ATR | Automatic Tampon Removal |
| ATR | Advanced Tongue Root |
| ATR | Automatic Tampon Remover |
| ATR | Art Therapist Registered |
| ATR | Alaska Trauma Registry |
| ATR | Alternate Trunk Routing |
| ATR | Almost Totally Real |
| ATR | Acid-Tolerance Response |
| ATR SULF | Atropine Sulfate |
| ATR1 | Automatic Target Recognition module |
| ATRA | All-transretinoic Acid |
| ATRA | American Tort Reform Association |
| ATS | Anti Tetanus Serum |
| ATS | Anti Terrorisum Squad |
| ATS | Automatic Transfer Switch |
| ATS | At Title Screen |
| ATS | Anxiety tension state |
| ATS | Australian Veterinary Association |
| ATS | Analytic Trouble Shooting |
| ATS | Alternate Training Solutions |
| ATS | Air Traffic Service |
| ATS | Advanced Technology Satellite |
| ATS | Aeronautical Telecommunications Services |
| ATS | Applications Technology Satellite |
| ATS | Antarctic Treaty System |
| ATS | Alpha-D-tocopherol Acid Succinate |
| ATSA | Aviation and Transportation Security Act |
| ATSC | Advanced Television Systems Committee |
| ATSC | AlliedSignal Technical Services Corporation |
| ATSCCP | ATS Contingency Command Post |
| ATSI | Aboriginal Torres Strait Islander |
| ATSI | Aboriginal and Torres Strait Islander |
| ATSIC | Aboriginal and Torres Strait Islander Commission |