| MMSC | Madras Motor Sports Club 
| Others |
| MMSC | Maker's Mark Secretariat Center
| Others |
| MMSC | Marine Mammal Stranding Center
| Others |
| MMSC | Marshalltown Medical and Surgical Center
| Others |
| MMSC | Marshalltown Medical Surgical Center
| Others |
| MMSC | Marvin Moss Student Center
| Others |
| MMSc | Master of Medical Science
| Others |
| MMSc | Master of Medical Sciences
| Others |
| MMSC | Medicines Management Services Collaborative
| Others |
| MMSC | Methyl Methionine Sulfonium Chloride
| Others |
| MMSC | Metropolitan Milwaukee Ski Council
| Others |
| MMSC | Metropolitan Mortgage and Securites Company, Inc.
| Others |
| MMSC | Metropolitan Multi Service Center
| Others |
| MMSC | Minimum Monthly Service Charge
| Others |
| MMSC | Mississippi Model Security Council
| Others |
| MMSC | Mitsubishi Motor Sales Caribbean
| Others |
| MMSC | Mobex Managed Service Company
| Others |
| MMSC | Mohammadpur Model School & College
| Others |
| MMSC | Moncton Motor Sport Club
| Others |
| MMSC | Montgomery Multiple Sclerosis Center
| Others |
| MMSC | Mt Mansfield Ski Club
| Others |
| MMSC | Multi Media Service Center
| Others |
| MMSC | Multi Media Service Centre
| Others |
| MMSC | Multimedia Message Service Center
| Others |
| MMSC | Multimedia Messaging Service Center
| Others |
| MMSC | Multimedia Messaging Services Center
| Others |
| MMSC | Multimedia Messaging System Center
| Others |
| MMSC | Mundelein Mustang Swim Club
| Others |