| Abbreviation | Definition |
|---|---|
| PTI | Polskie Towarzystwo Informatyczne |
| PTK | Polish Cardiac Society |
| PTK | Polskie Towarzystwo Kardiologiczne |
| PTL | Polish Medical Association |
| PTL | Polskie Towarzystwo Lekarskie |
| PTOS | Patent and Trademark Office Society |
| PTRS | Pennsylvania Therapeutic Recreation Society |
| PTS | Pediatric Trauma Society |
| PTS | The Professional Technicians Society |
| PTSS | Philippine Tarantula and Scorpion Society |
| PUCS | Perth Undergraduate Choral Society |
| PUG | Provinciaal Utrechts Genootschap van Kunsten en Wetenschappen |
| PUG | Provincial Utrecht Society of Arts and Sciences |
| PUPS | Parachutists Under Phorty Society |
| PUPS | Park Users and Pets Society |
| PURD | Played Used Rubbished and Dumped. |
| PVS | Pre Vinylite Society |
| PWOS | Petts Wood Operatic Society |
| PYPS | Presbyterian Young Peoples Society |
| QAAS | Queensland Academy of Arts and Sciences |