USPS
| Acronym | Definition |
|---|---|
| USPS | United States Postal Service |
| USPS | United States Power Squadrons |
| USPS | University Support Personnel System (various locations) |
| USPS | Uniform Staff Payroll System (software) |
| USPS | Uniform Statewide Payroll System (Texas) |
| USPS | Union of Swiss Philatelic Societies (Switzerland) |