| Acronym | Definition |
|---|
| MSSP | Medicare Shared Savings Program |
| MSSP | Managed Security Service Provider |
| MSSP | Mechanical Systems and Signal Processing (journal; Elsevier BV) |
| MSSP | Multi Service Switching Platform |
| MSSP | Microsoft Security Provider |
| MSSP | Market Segment Specialization Program |
| MSSP | Master Synchronous Serial Port |
| MSSP | Multi-Service Switching Platform |
| MSSP | Multi-purpose Senior Services Program |
| MSSP | Microsoft Smooth Streaming Protocol (software) |
| MSSP | Maximum Static Sealing Pressure |
| MSSP | Missionary Society of Saint Paul |
| MSSP | Medicare Stop Smoking Program |
| MSSP | Multi-Sensor Stabilized Payload |
| MSSP | Medical Staff Services Professional (healthcare industry) |
| MSSP | Multi-Senior Services Program |
| MSSP | Mobile Service Switching Point (ProQuent Systems) |
| MSSP | Modeling & Simulation Strategic Plan |
| MSSP | Modeling & Simulation Support Plan |
| MSSP | Management System Steering Panel |
| MSSP | Modified Spatial Smoothing Preprocessing |
| MSSP | Management System Support Project |
| MSSP | Market Segment Reports (IRS) |
| MSSP | Modified Successive Shortest Path |
| MSSP | Multiprocessor Similarity Stack Protocol |