MBSI
| Acronym | Definition |
|---|---|
| MBSI | Music Box Society International |
| MBSI | Miller Building Systems Inc. (Elkhart, IN) |
| MBSI | Mortgage Builder Software, Inc. (Southfield, MI) |
| MBSI | Micro Business Solutions, Inc. (Nevada) |
| MBSI | MedAmerica Billing Services, Inc. |
| MBSI | Michigan Brain and Spine Institute |