| PMSA | Pacific Medical Student Association 
| Others |
| PMSA | Pacific Merchant Shipping Association
| Others |
| PMSA | Pacific Midrange Systems Association
| Others |
| PMSA | Pakistan Maritime Security Agency
| Others |
| PMSA | Pan Mixers South Africa
| Others |
| PMSA | Pediatric Multiple Sclerosis Alliance
| Others |
| PMSA | Pennsylvania Middle School Association
| Others |
| PMSA | Perry Main Street Association
| Others |
| PMSA | Pharmaceutical Management Science Association
| Others |
| PMSA | Philippine Mermaid Swimming Academy
| Others |
| PMSA | Portfolio Management Software Alliance
| Others |
| PMSA | Portfolio Management Software Alliance, Inc.
| Others |
| PMSA | Portland Metro Softball Association
| Others |
| PMSA | Pre Medical Student Association
| Others |
| PMSA | Pre Medical Students Association
| Others |
| PMSA | Precision Medicine Student Alliance
| Others |
| PMSA | Presbyterian and Methodist Schools Association
| Others |
| PMSA | President's Meritorious Service Awards
| Others |
| PMSA | Primary Metropolitan Statistical Area
| Others |
| PMSA | Primary Metropolitan Statistical Areas
| Others |
| PMSA | Primary Statistical Metropolitan Area
| Others |
| PMSA | Principal Metropolitan Statistical Area
| Others |
| PMSA | Professional Managers Supervisors Association
| Others |
| PMSA | Professional Medical Scheme Administrator
| Others |
| PMSA | Project Management South Africa
| Others |
| PMSA | Project Management System Assessment
| Others |
| PMSA | Property Management System Analysis
| Others |
| PMSA | Proviso Math and Science Academy
| Others |
| PMSA | Proviso Mathematics and Science
| Others |
| PMSA | Proviso Mathematics and Science Academy
| Others |
| PMSA | Public Monument and Sculpture Association
| Others |
| PMSA | Public Monuments and Sculpture Association
| Others |
| PMSA | Puyallup Main Street Association
| Others |