| MSCC | Madison Sports Car Club 
| Others |
| MSCC | Maine Shared Collection Cooperative
| Others |
| MSCC | Manila Sports Car Club
| Others |
| MSCC | Manned Systems Control Center
| Others |
| MSCC | Marine Science Co-ordination Committee
| Others |
| MSCC | Marketing Solutions Consulting Center
| Others |
| MSCC | Martin Sports Car Club
| Others |
| MSCC | Maryborough Sporting Car Club
| Others |
| MSCC | Massive Support for Creative Content
| Others |
| MSCC | Master Strength Conditioning Coach
| Others |
| MSCC | Mauritius Software Craftsmanship Community
| Others |
| MSCC | Mazda Sports Car Club
| Others |
| MSCC | Medium Scale Critical Components
| Others |
| MSCC | Metastatic spinal cord compression
| Others |
| MSCC | Michigan Sports Car Club
| Others |
| MSCC | Microsoft Common Controls
| Others |
| MSCC | Mid South Chevelle Club
| Others |
| MSCC | Mid South Community College
| Others |
| MSCC | Mid-South Community College
| Others |
| MSCC | Middle School Cadet Corps
| Others |
| MSCC | Modified Suzuki Ciaz Club
| Others |
| MSCC | Monklands Sporting Car Club
| Others |
| MSCC | Monroe Senior Citizens Center
| Others |
| MSCC | Morgan Sports Car Club
| Others |
| MSCC | Motlow State Community College
| Others |
| MSCC | Multiple Service Credit Control
| Others |
| MSCC | Murwillumbah Sporting Car Club
| Others |
| MSCC | My Star Collector Car
| Others |