| Acronym | Definition |
|---|
| MSOA | Middle School of the Arts (Florida) |
| MSOA | Missouri State Orthopaedic Association |
| MSOA | Mediterranean Society of Otology and Audiology |
| MSOA | Meadows Standardbred Owners Association (Meadow Lands, PA) |
| MSOA | Maryland Student Officials Association |
| MSOA | Magazine Service of America (Lakewood, OH) |
| MSOA | Manitoba Swim Officials Association (Canada) |
| MSOA | Mid State Officials Association |
| MSOA | Medical School Operating Agreement |
| MSOA | Mini Stock Owners Association |
| MSOA | Method of Sequencing Operations for Assembly |
| MSOA | Metropolitan Symphony Orchestral Association (Minneapolis, MN) |
| MSOA | Masters School of Art |