- Machine Shop & Tool Repair Service, Lyons
- Machinery, Supplies & Equipment - Business Production Related, Lyons
- Machinery, Supplies & Equipment - Construction & Contractor Related, Lyons
- Major Appliances, Lyons - Household & Kitchen
- Manicurists & Pedicurists, Lyons
- Manufacturing, Lyons
- Marriage & Family Counselors, Lyons
- Masonry Materials & Supplies, Lyons
- Massage Therapists & Professional, Lyons
- Massage Therapy, Lyons
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- Membership Sports & Recreation Clubs, Lyons
- Mental Health Clinics, Lyons - Treatment Centers
- Methodist Church, Lyons
- Mining, Lyons
- Miscellaneous Government, Lyons
- Miscellaneous Industry, Lyons
- Miscellaneous Personal Services, Lyons
- Miscellaneous Professional, Lyons
- Motor Vehicle, Lyons
- Museums, Lyons
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