| Acronym | Definition |
|---|
| UPO | Uniformed Police Officer (various locations) |
| UPO | Universidad Pablo de Olavide (Spanish university; est. 1997; Seville, Spain) |
| UPO | United Planning Organization |
| UPO | University Police Officer (various schools) |
| UPO | University Planning Office (various universities) |
| UPO | Union Philharmonic Orchestra (Hong Kong University Students' Union) |
| UPO | Updated Path Ordering |
| UPO | Uniform Physical Optics |
| UPO | Utilities Program Office |
| UPO | Unit Project Officer |
| UPO | Unattended Point-Of-Sale |
| UPO | Units Per Order |
| UPO | Unit Personnel Office/r |