| MSEF | Mahomet Seymour Education Foundation 
| Others |
| MSEF | Managed Service Extensibility Framework
| Others |
| MSEF | Manitou Springs Education Foundation
| Others |
| MSEF | Medford Ski Education Foundation
| Others |
| MSEF | Mercer Science and Engineering Fair
| Others |
| MSEF | Metropolitan Science and Engineering Fair
| Others |
| MSEF | Michigan Safe Energy Future
| Others |
| MSEF | Millennia Scope Entertainment Foundation
| Others |
| MSEF | Mississippi Science and Engineering Fairs
| Others |
| MSEF | Motorsports Safety Education Foundation
| Others |
| MSEF | Mount Sneffels Education Foundation
| Others |
| MSEF | Mt. Shasta Education Foundation
| Others |