| MSWG | Machine Studies Working Group
| Others |
| MSWG | Manufacturing Systems Working Group
| Others |
| MSWG | Marine Safety Working Group
| Others |
| MSWG | Marine Shipping Working Group
| Others |
| MSWG | Market Settlement Working Group
| Others |
| MSWG | Materials Science Working Group
| Others |
| MSWG | Mechanical Systems Working Group
| Others |
| MSWG | Meeting Strategy Working Group
| Others |
| MSWG | Migration Studies Working Group
| Others |
| MSWG | Military Spending Working Group
| Others |
| MSWG | Mining Security Working Group
| Others |
| MSWG | Minority Shareholders Watch Group
| Others |
| MSWG | Mission Specific Working Group
| Others |
| MSWG | Modelling and Simulation Working Group
| Others |
| MSWG | Multi State Working Group
| Others |