PSTR
| Acronym | Definition |
|---|---|
| PSTR | Pension Scheme Tax Reference (UK) |
| PSTR | Port Stanley Terminal Rail (tourist railway; Canada) |
| PSTR | Pilgrim Sands Trail Riders (motorcycle club; Massachusetts) |
| PSTR | Pre-Storage Review |
| PSTR | Post System Test Review |
| PSTR | proportion of days in therapeutic range |
| PSTR | Pumpless Steel Tank Rectifier |