| MSRS | Maine State Retirement System 
| Others |
| MSRS | Manic State Rating Scale
| Others |
| MSRS | Market Settlements Reporting System
| Others |
| MSRS | Master of Science in Radiation Sciences
| Others |
| MSRS | Master of Science in Radiologic Sciences
| Others |
| MSRS | Master of Science in Regenerative Studies
| Others |
| MSRS | Materiel System Requirements Specification
| Others |
| MSRS | Medical Scientist Research Symposium
| Others |
| MSRS | Medical Student Research Scholars
| Others |
| MSRS | Mental Status Reporting Software
| Others |
| MSRS | Metalsmith (ship Repair Sheet Metal)
| Others |
| MSRS | Microsoft Remote Scripting
| Others |
| MSRS | Microsoft Reporting Services
| Others |
| MSRS | Mid South Rocket Society
| Others |
| MSRS | Military Service Recognition Scholarship
| Others |
| MSRS | Milled Shoulder Rumble Strips
| Others |
| MSRS | Miniature Scale Refrigeration Systems
| Others |
| MSRS | Minnesota State Retirement System
| Others |
| MSRS | Molecular Sieve Regeneration System
| Others |
| MSRS | Motorola Semiconductor Reuse Standards
| Others |
| MSRS | Multicultural Student Retention Services
| Others |
| MSRS | Multiple Sclerosis Resiliency Scale
| Others |
| MSRS | Multiple Streamer Recording System
| Others |