MASI
| Acronym | Definition |
|---|---|
| MASI | Melasma Area and Severity Index (dermatology) |
| MASI | Manhattan Sites (US National Park Service) |
| MASI | Metropolitan Andrey Sheptytsky Institute (Saint Paul University; Ottawa, Canada) |
| MASI | Major Acquisition Systems Infrastructure (US Coast Guard) |
| MASI | Mach Airspeed Indicator |
| MASI | Multithreaded Architecture for Software I/O |
| MASI | ManTech Advanced Systems International, Inc. (Glen Burnie, MD) |
| MASI | Member of the Architectural and Surveying Institute |