| Acronym | Definition |
|---|
| MSCA | Master Source Code Agreement |
| MSCA | Mechanical Service Contractors of America |
| MSCA | Military Support to Civil Authorities |
| MSCA | Microsoft Certified Systems Administrator |
| MSCA | Massachusetts Systems Contractors Association (Sharon, MA) |
| MSCA | Missing Cargo (shipment accuracy) |
| MSCA | Mobile Supply Chain Application |
| MSCA | Marque Sports Car Association |
| MSCA | Multi-Site Cooperative Agreement |
| MSCA | Minnesota State Chess Association |
| MSCA | Mississippi Scholastic Chess Organization |
| MSCA | Master-at-Arms of the Society for Creative Anachronism |