| Acronym | Definition |
|---|
| MPSS | Mirror Polished Stainless Steel |
| MPSS | Multi Point Signaling Server |
| MPSS | Modular Payload Support Structure |
| MPSS | Massively Parallel Signature Sequencing |
| MPSS | Mission Planning and Scheduling System (US NASA) |
| MPSS | Methylprednisolone Sodium Succinate |
| MPSS | Multiple Page Size Support |
| MPSS | Ministry of Public Safety and Security (Canada) |
| MPSS | Mainz Pain Staging System |
| MPSS | Macpherson Secondary School (Singapore) |
| MPSS | MIC (Many Integrated Core) Platform Software Stack (Intel) |
| MPSS | Manning Primary Safety System |
| MPSS | McKinnon Park Secondary School |
| MPSS | Multipoint Signaling Server (Clarent) |
| MPSS | Metropolitan Programs and Summer Sessions |
| MPSS | Minnesota Physicians Support Services (program) |
| MPSS | Military Personnel Support Staff (Canada) |
| MPSS | Managed Premises Security Services |
| MPSS | Multi Purpose Space Station |
| MPSS | Market Price Supply Service |
| MPSS | Most Productive Software Size |
| MPSS | Members of Parliament Support Staff (UK) |
| MPSS | Multiple Probes Spectrophotometer System |
| MPSS | Migration Plan Support System |
| MPSS | Microprocessed Soldering System |
| MPSS | Mission Procurement Support System (Canada) |
| MPSS | Microsoft Product Support Services |
| MPSS | Management Programs and Services Staff |
| MPSS | Multi-Service Provisioning Platform (Cisco) |
| MPSS | Main Parachute Support Structure (NASA) |
| MPSS | Manipal Packaging Software Solutions (India) |