- Machine Shop, Lyons
- Machinery, Supplies & Equipment - Business Supplies Related, Lyons
- Machinery, Supplies & Equipment - Construction & Contractor Related, Lyons
- Manicurists & Pedicurists, Lyons
- Manufacturing, Lyons
- Manufacturing Products, Lyons
- Masonry Materials & Supplies, Lyons
- Mausoleums Developers, Lyons
- Meat Market, Wholesale & Products, Lyons
- Medical Diagnostic Clinics, Lyons - Clinical Labs & Centers
- Membership Sports & Recreation Clubs, Lyons
- Metal Buildings, Lyons - Kits, Homes, Steel Buildings, etc
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- Methodist Church, Lyons
- Mexican Restaurants, Lyons
- Mining, Lyons
- Miscellaneous Government, Lyons
- Miscellaneous Manufacturing, Lyons
- Miscellaneous Photographers, Lyons
- Miscellaneous Professional, Lyons
- Monuments, Tombstones, Markers & Memorials, Lyons
- Motor Vehicle, Lyons
- Motor Vehicle Rental & Leasing, Lyons
- Moving Truck Rental , Lyons
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