- Machine Shop & Tool Repair Service, Williamsburg
- Mail Delivery Service, Williamsburg
- Mailing, Delivery & Courier Service, Williamsburg
- Management Consultants & Services, Williamsburg
- Manufacturing, Williamsburg
- Manufacturing Services, Williamsburg
- Marinas & Marina Services, Williamsburg
- Masonry Materials & Supplies, Williamsburg
- Mechanical Contractors, Williamsburg - Install, Service & Repair
- Merchandise Sales Events, Williamsburg
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- Methodist Church, Williamsburg
- Miscellaneous Government, Williamsburg
- Miscellaneous Industry, Williamsburg
- Miscellaneous Photographers, Williamsburg
- Miscellaneous Professional, Williamsburg
- Motor Vehicle, Williamsburg
- Motor Vehicle Rental & Leasing, Williamsburg
- Moving & Storage Supplies & Equipment, Williamsburg
- Moving Companies, Williamsburg
- Moving Truck Rental , Williamsburg
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