| Abbreviation | Definition |
|---|---|
| PharmacolResCommun | Pharmacological Research Communications |
| PharmacolRev | Pharmacological Review |
| PharmacolTher | Pharmacology and Therapeutics |
| PharmChemJ | Pharmaceutical Chemistry Journal |
| PHEL | Public Health Electronic Library |
| PHIL | Public Health Image Library |
| PHL | PHP Hash Library |
| PHML | Patrick Henry Memorial Library |
| PHPL | Palos Heights Public Library (Palos Heights, IL) |
| PHPL | Pauline Haass Public Library (Sussex, WI) |
| PHPL | Pleasant Hills Public Library (Pittsburgh, PA) |
| PHPL | Prospect Heights Public Library (Prospect Heights, IL) |
| PHPLD | Prospect Heights Public Library District (Prospect Heights, IL) |
| PI | Public Inquiry |
| PIBL | Presque Isle Branch Library |
| PICL | Platform Information and Control Library |
| PICL | Portable Instrumented Communication Library |
| PIL | Python Imaging Library |
| PIL | Pytohn Image Library |
| PIPL | Plover Inventory and Productivity Library |