| Acronym | Definition |
|---|
| PSTL | Postal |
| PSTL | Polo Scientifico Tecnologico Lombardo |
| PSTL | Pyramid Saimira Theatre Ltd |
| PSTL | Panasonic Speech Technology Laboratory |
| PSTL | Puget Sound Truck Lines |
| PSTL | Parallel Standard Template Library |
| PSTL | Pasukan Simpanan Tentera Laut (Malaysia) |
| PSTL | Puget Sound Traveling League (girls basketball) |
| PSTL | Passing Shot Tennis League |
| PSTL | Palangsophon Two Company Limited |
| PSTL | Problem Solving through Literature |
| PSTL | Product Support Team Leader |
| PSTL | Projet Serveur Terminaux Linux (French) |
| PSTL | Praxair Surface Technologies Limited |