| Acronym | Definition |
|---|
| MPSA | Midwest Political Science Association |
| MPSA | Multiprocessor Parallel Server Architecture |
| MPSA | Multi Port Serial Adapter |
| MPSA | Master of Public Service and Administration (Texas A&M University) |
| MPSA | Military Postal Service Agency |
| MPSA | Mineral Production Sharing Agreement |
| MPSA | Microsoft Personal Security Advisor |
| MPSA | Mississippi Private School Association |
| MPSA | Mitsubishi Power Systems Americas (Lake Mary, FL) |
| MPSA | Multiple Protein Sequence Analysis |
| MPSA | Mobile Payment Services Association |
| MPSA | Malta Pharmaceutical Students' Association |
| MPSA | Most Preferred Single Answer (marketing) |
| MPSA | Majlis Perbandaran Shah Alam |
| MPSA | Minority Psychology Student Association |
| MPSA | Mississippi Political Science Association |
| MPSA | Marine Protection and Sanctuaries Act of 1972 |
| MPSA | Maxima Pérdida Sanguínea Aceptable |
| MPSA | Midwest Practical Shooting Association |
| MPSA | Maryland Practical Shooting Association |
| MPSA | Master Professional Service Agreement |