| Acronym | Definition |
|---|
| MSAS | Multiple Shadow Address Space |
| MSAS | Microsoft Server Active Sync |
| MSAS | Mcafee Security Alerting Service |
| MSAS | Mobility Support Advisory Squadron (US Air Force) |
| MSAS | Microsoft AntiSpyware |
| MSAS | Ministerio de Sanidad Y Asistencia Social (Venezuela) |
| MSAS | MTSAT Satellite-based Augmentation System (Japan) |
| MSAS | Master of Science in Administrative Studies |
| MSAS | Media State Aggregation Service (Microsoft) |
| MSAS | Multimission Spacecraft Analysis Subsystem (US NASA) |
| MSAS | Marine Spill Analysis System |
| MSAS | Military Simulation Assessment System |
| MSAS | McGregor Swire Air Services |
| MSAS | Microwave Signature Acquisition System |
| MSAS | Multi-Sensor Analysis System |
| MSAS | Manchester Students Against Sweatshops |
| MSAS | Multi-Service Access Server (Eastern Research) |