| Abbreviation | Definition |
|---|---|
| OUM | Oxford University Museum |
| OXT | Ottoman Turks 1690 - 1890 |
| PAHMA | Phoebe A Hearst Museum of Anthropology |
| PAM | Portland Art Museum |
| PAMA | Peel Art gallery, Museum + Archives |
| PAMM | Perez Art Museum Miami |
| PASM | Pima Air & Space Museum |
| PASM | Pima Air and Space Museum |
| PCAM | Pacific Coast Air Museum |
| PCHC | Presbyterian Church Heritage Centre |
| PCMA | Peterborough Centennial Museum and Archives |
| PCMC | Panama Canal Museum Collection |
| PEM | Peabody Essex Museum |
| PEMP | Pratt Emerging Museum Professionals |
| PFMA | Petrified Forest Museum Association |
| PHMM | Palestine Holocaust Memorial Museum |
| PHMM | Palestinian Holocaust Memorial Museum |
| PISM | Polish Institute and Sikorski Museum |
| PLMM | Port of Ludington Maritime Museum |
| PMA | Philadelphia Museum of Art |