| Abbreviation | Definition |
|---|---|
| PUDR | People Union for Democratic Rights |
| PUDR | Peoples Union for Democratic Rights |
| PUDR | People's Union for Democratic Rights |
| PUES | Pacific Union Elementary School |
| PUES | Peninsula Union Elementary School |
| PUFE | Phoenix Union Foundation for Education |
| PUFS | Peer Union File System |
| PULSED | Puttalam Union for Literacy Social Environmental Development |
| PUMC | Peking Union Medical College |
| PUNS | Partido de Unión Nacional Saharaui |
| PUO | Parents Union Online |
| PUO | Party Union Opfikon |
| PUSD | Peoria Union School District |
| PVCU | Pioneer Valley Credit Union |
| PWU | Palestinian Women Union |
| PWU | Palestinian Women's Union |
| PWU | Power Workers Union |
| PWU | POWER WORKERS' UNION |
| PWU | Public Workers Union |
| PWUA | Postal Workers Union of Aotearoa |