| Acronym | Definition |
|---|
| MSSC➣Middle School Student Council (various locations) |
| MSSC➣Microsoft Solutions for Security and Compliance |
| MSSC➣Multiband Switch and Service Configuration |
| MSSC➣Mississippi Supreme Court |
| MSSC➣Manufacturing Skill Standards Council |
| MSSC➣Mississippi State Sovereignty Commission (1956 to 1977) |
| MSSC➣Mississippi Safe Schools Coalition |
| MSSC➣Managed Services Support Center |
| MSSC➣Multiple Sclerosis Society of Canada |
| MSSC➣Master of Social Science |
| MSSC➣Manila Shared Services Center (Chevron; Philippines) |
| MSSC➣Microsoft Sidewinder Strategic Commander (gaming) |
| MSSC➣Marine Society and Sea Cadets (UK) |
| MSSC➣Microsoft Site Server Commerce (software) |
| MSSC➣Medium SEAL Support Craft |
| MSSC➣Most Severe Single Contingency (energy management) |
| MSSC➣Midland Speed Skating Club (Midland, Michigan) |
| MSSC➣Missouri Seismic Safety Commission |
| MSSC➣Middle States Steering Committee (various organizations) |
| MSSC➣Muscle Shoals Sailing Club (Alabama) |
| MSSC➣Multicultural Student Services Center |
| MSSC➣Maui Space Surveillance Complex |
| MSSC➣Microscopic Society of Southern California |
| MSSC➣Mobile Services Switching Center |
| MSSC➣Maritime Satellite Switching Center (ITU-T) |
| MSSC➣Mobile Satellite Switching Center |
| MSSC➣Mass Storage System Communicator |
| MSSC➣Mount Shasta Soaring Center (California, aviation) |
| MSSC➣Mount Shasta Soaring Center |
| MSSC➣Medium-Speed, Single Copy (printer) |
| MSSC➣Maridos Sometidos Social Club (Spanish: Submitted Husbands Social Club; Fredericksburg, VA) |
| MSSC➣Missionaries of the Sacred Hearts of Jesus and Mary (religious order) |
| MSSC➣Multi-Band Switch and Service Configuration |
| MSSC➣Mean Summer SCRIM (Sideways Co-Efficient Routine Investigation Machine) Coefficient (engineering) |
| MSSC➣Magnavox Signaal Systems Company |