- Machinery, Supplies & Equipment - Business Supplies Related, Yorktown
- Machinery, Supplies & Equipment - Construction & Contractor Related, Yorktown
- Manufacturing, Yorktown
- Medical Alert Systems, Yorktown - Medical Alarms - PERS
- Medical Supplies & Equipment, Yorktown
- Metal Buildings, Yorktown - Kits, Homes, Steel Buildings, etc
- Metal Products, Yorktown
- Methodist Church, Yorktown
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- Mexican Restaurants, Yorktown
- Miscellaneous Government, Yorktown
- Miscellaneous Professional, Yorktown
- Monuments, Tombstones, Markers & Memorials, Yorktown
- Mortgage Bankers & Correspondents, Yorktown
- Motor Vehicle, Yorktown
- Music, Yorktown
- Musical Instruments & Equipment Stores, Yorktown
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