| Abbreviation | Definition |
|---|---|
| PLDT | Public Library Development Team (Madison, WI) |
| PLF | Public Library Fund |
| PLGDB | Public Library Geographic Database |
| PLIF | Public Library Improvement Fund |
| PLIG | Programming Librarian Interest Group |
| PLIG | Public Libraries Interest Group |
| PLIP | Public Library Innovation Program |
| PLIP | Public Library Innovation Programme |
| PLL | Pre linked library |
| PLL | Private Law Libraries |
| PLL | Professional Learning Library |
| PLLF | Public Library Leaders Fellowship |
| PLLF | Public Library Leadership Fellows |
| PLMP | Preservation of Lao Manuscripts Programme |
| PLOB | Public Library of Bioinformatics |
| PLOL | Play and Leisure Opportunity Library |
| PLOL | Public Library of Law |
| PLOM | Public Library of Models |
| PLOS | Public Library of Science |
| PLoS | The Public Library of Science |