| Abbreviation | Definition |
|---|---|
| På | at, in [Norwegian] |
| PAARL | Philippine Association of Academic/Research Librarians |
| PAB | Politisches Archiv Berlin |
| PAC | Patron Access Catalog |
| PAC | Public Access Catalog |
| PACL | Palo Alto City Library |
| PAHS | Palo Alto Historical Society |
| PAL | Platform Abstraction Library |
| PALA | Pratt American Library Association |
| PALS | Project for Automated Library Systems |
| PALS | Public Access Library System |
| PAP | PAPER binding |
| PARL | Pictou Antigonish Regional Library |
| PARL | Provincial Archaeological Report Library |
| PASCAL | Partnership Among South Carolina Academic Libraries |
| PASL | Parallel Algorithm Scheduling Library |
| PATL | Practical Algorithm Template Library |
| PAWL | Pike Amite Walthall Library |
| pb | paperback |
| PB | paper-back [book] |