| Abbreviation | Definition |
|---|---|
| PCPL | Pima County Public Library |
| PCPL | Portage County Public Library |
| PCPL | Poseyville Carnegie Public Library |
| PCPL | Putnam County Public Library |
| PDL | Pauls Drawing Library |
| PDL | Peripheral Driver Library |
| PDL | Portage District Library |
| PDM | Public Domain Mark |
| PDMS | Panasonic Document Management System |
| PDR | Physicians' Desk Reference |
| PDR | Physicians' Desk Reference (a proprietary publication) |
| PECL | Php Extension Code Library |
| PECL | Php Extension Community Library |
| PEL | PHP Exif Library |
| PEMB | Pemberville Public Library |
| PestBiochemPhysiol | Pesticide Biochemistry and Physiology |
| PFSL | Poznan Foundation of Scientific Libraries |
| PGAL | Parallel Genetic Algorithm Library |
| PGLAF | Project Gutenberg Literary Archive Foundation |
| PharmaceutJ | Pharmaceutical Journal |