| Abbreviation | Definition |
|---|---|
| OVG | Ontario Veterinary Group |
| OVH | Olympic Veterinary Hospital |
| OVH | Ottawa Veterinary Hospital |
| OVI | Onderstepoort Veterinary Institute |
| OVJ | Open Veterinary Journal |
| OVMA | Ohio Veterinary Medical Association |
| OVMA | Oklahoma Veterinary Medical Association |
| OVMA | Ontario Veterinary Medical Association |
| OVMA | Oregon Veterinary Medical Association |
| OVRA | Oregon Veterinary Referral Associates |
| P | Paws |
| P | Penguin |
| P | Phineas |
| P | Pony |
| P | Poodle |
| PAA | Pet Allergy Association |
| PAAG | Pet Advertising Advisory Group |
| PAC | Pet Advisory Committee (formerly JACOPIS) |
| PACAS | People Against Companion Animal Slaughter |
| PADS | People and Dogs Society |