| Acronym | Definition |
|---|
| MCSB➣Michigan Celebrates Small Business (Grand Rapids, MI) |
| MCSB➣Marine Cryptologic Support Battalion (USMC) |
| MCSB➣Mission Control Station Backup |
| MCSB➣Monroe County School Board (Monroe County, FL) |
| MCSB➣Mississippi Community Symphonic Band (Jackson, MS) |
| MCSB➣Mercer County State Bank (Sandy Lake, PA) |