| Abbreviation | Definition |
|---|---|
| ACVO | American College of Veterinary Ophthalmologists |
| AD | Agility Dog |
| AD | American Dog |
| ADAA | Agility Dog Association of Australia |
| ADAI | Assistance Dogs for Achieving Independence |
| ADBA | American Dog Breeders Association |
| ADC | Agility Dog of Canada |
| ADCH | Agility Dog Champion |
| ADD | A Dog's Dream |
| ADDO | A Dogs Day Out |
| ADGW | Alaska Dogs Gone Wild |
| ADHF | Agility Dog Hall of Fame |
| ADHH | Automated Dog House Heater |
| ADMA | Alaska Dog Mushers Association |
| ADOA | American Dog Owners Association |
| ADOPT | A Dog On Prison Turf |
| ADTC | Azalea Dog Training Club |
| ADTP | Assistance Dog Training Program |
| AFA | Available For Adoption |
| AFC | Amateur Field Champion |