| Acronym | Definition |
|---|
| PMSS | Pine Mountain Settlement School (Pine Mountain, KY) |
| PMSS | Plafond Mensuel de la Sécurité Sociale (France) |
| PMSS | Program Management Support Services |
| PMSS | Pitt Meadows Secondary School (Vancouver, BC, Canada) |
| PMSS | Port Moody Secondary School (Vancouver, BC, Canada) |
| PMSS | Portable Modular Source System (Thalassa Energy Services Ltd) |
| PMSS | Program Management Support System |
| PMSS | Princess Margaret Secondary School (Surrey, BC, Canada) |
| PMSS | Palestinian Medical Students Society |
| PMSS | Post-Marketing Surveillance Study (pharmaceutical monitoring) |
| PMSS | Project Manager's Support System |