| Acronym | Definition |
|---|
| MCSO➣Multnomah County Sheriff's Office (Portland, Oregon) |
| MCSO➣Marion County Sheriff’s Office |
| MCSO➣Modulo Certified Security Officer (Brazil) |
| MCSO➣Mecklenburg County Sheriff's Office (North Carolina) |
| MCSO➣Mayes County Sheriffs Office (Oklahoma) |
| MCSO➣Medical Center of Southeastern Oklahoma |
| MCSO➣Montgomery County Sheriff's Department (Conroe, TX) |
| MCSO➣Maricopa County Sheriffs Office (Arizona) |
| MCSO➣Midcoast Symphony Orchestra (Brunswick, ME) |
| MCSO➣Morris County Sheriff's Office (Morristown, New Jersey) |
| MCSO➣Morrow County Sheriff's Office (Heppner, OR) |
| MCSO➣Medical Coding Service Organization |
| MCSO➣Musashino Civic Symphony Orchestra (Musashino, Japan) |
| MCSO➣Maricopa County Sellers Organization (Phoenix, Arizona) |
| MCSO➣Mission Control and Support Officer |
| MCSO➣Methylene Chloride Soluble Organics |