| Abbreviation | Definition |
|---|---|
| APT | Association of Pharmacy Technicians |
| APTA | American Public Transportation Association |
| APTG | Association of Professional Tourist Guides |
| APTT | Association of Part Time Tutors |
| APVMA | Alberta Pressure Vessel Manufacturers Association |
| AQTIS | Alliance Québécoise des Techniciens de l’image et du Son |
| AQuA | App Quality Alliance |
| ARAA | Alberta Registry Agents Association |
| ARAA | Australian Robotics and Automation Association |
| ARAC | Arabian Racing Association Of California |
| ARAF | Arabian Racing Association Of Florida |
| ARAV | Association Of Reptilian And Amphibian Veterinarians |
| ARAV | Australian Retailers Association Of Victoria |
| ARAV | Australian Retailers Association Victoria |
| ARBA | A American Rabbit And Bunnies Association |
| ARBA | American Rabbit Breeders Association |
| ARBA | American Rabbit Breeders Associationall |
| ARBA | American Rare Breed Association |
| ARBA | American Romney Breeders Association |
| ARCA | American Race Car Association |