sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Middle Atlantic Society of Orthodontists | ** |
| Midlands AIDS Service Organization | ** |
| Montana Association of Symphony Orchestras | ** |
| Michigan Avenue Sound Orchestra | ** |
| Moon Area Support Organization | ** |
| Midlands Aids Service Organisation | ** |
| Major Account Sales Organization | * |
| Municipal Agricultural Services Office | * |
| Middlebury Asian Students Organization | * |
| Midlands Aids Support Organisation | * |
| Management Analysis and Services Organization | * |
| Munitions Accountable Supply Officer | * |