| Acronym | Definition |
|---|
| MAARS➣Modular Advanced Armed Robotic System (Foster-Miller, Inc; QineticQ North America; Waltham, MA) |
| MAARS➣Midwest Avian Adoption and Rescue Services (Stillwater, MN) |
| MAARS➣Mississippi Assessment and Accountability Reporting System (Mississippi State Department of Education) |
| MAARS➣Maritime Aboriginal Aquatic Resources Secretariate (Truro Heights, Nova Scotia, Canada) |
| MAARS➣Modular ANI/ALI Retrieval System |
| MAARS➣Milwaukee Area Amateur Radio Society (est. 1980; Wisconsin) |