| Acronym | Definition |
|---|
| USSP➣User Space Serial Port |
| USSP➣Union du Sport Scolaire Polynésien (French: Polynesian School Sport Union) |
| USSP➣United States Special Police (Washington, DC) |
| USSP➣Uncontrolled Slip Seconds - Path (Telabs) |
| USSP➣United States Scouting Service Project |