| Acronym | Definition |
|---|
| PMSC | Private Maritime Security Company |
| PMSC | Port Marine Safety Code (UK) |
| PMSC | Policy Management Systems Corporation |
| PMSC | Political Military Steering Committee |
| PMSC | Program Management Systems Committee (National Defense Industrial Association) |
| PMSC | Post Mills Soaring Club (est.1987; flying club) |
| PMSC | Private Military and Security Company |
| PMSC | Postal Mechanisation Study Circle (est. 1976; London, UK) |
| PMSC | Porsche Mobil 1 Supercup (racing series) |
| PMSC | Peterborough Motor Sports Club |
| PMSC | Professional Media Service Corporation |
| PMSC | Premium Medical Service Card (health care industry) |
| PMSC | Pilipinong Migrante Sa Canada (Ottawa, ON, Canada) |
| PMSC | Pere Marquette Shipping Company |
| PMSC | Postgraduate Management Studies Certificate (academics) |
| PMSC | Personal Mail Service Center |
| PMSC | Pulse, Motor, Sensory and Capillary Refill (medical) |
| PMSC | Pitcairn-Monroeville Sportsman Club (North Versailles, PA) |
| PMSC | Philippine Migrants Society of Canada |
| PMSC | Project Management and Ship Consultant (various companies) |