| Abbreviation | Definition |
|---|---|
| PISCES | Performance Improving Self Contained Exoskeleton for Swimming |
| PJSL | Penn Jersey Swim League |
| PMSL | Prince Mont Swim League |
| PMSL | Prince-Mont Swim League |
| PNS | Pacific Northwest Swimming |
| PNSC | Portsmouth Northsea Swimming Club |
| POOS | Parents of Olympic Swimmers |
| POOS | Parents Of Our Swimmers |
| POSA | Palos Orland Swim Association |
| POSA | PALOS ORLAND SWIM ASSOCIATION'S |
| PPSC | Portage Porpoise Swim Club |
| PSSC | Puget Sound Swim Club |
| PVS | Potomac Valley Swimming |
| PVST | Pleasant Valley Swim Team |
| PWSL | Prince William Swim League |
| RFST | Rainier Foothills Swim Team |
| RFST | Rat Forced Swimming Test |
| RFST | Repeated forced swimming test |
| ROCS | Ravens Of Carleton Swimming |
| RSA | Raleigh Swimming Association |