- Machine Shop & Tool Repair Service, Norton
- Machinery, Supplies & Equipment - Business Production Related, Norton
- Machinery, Supplies & Equipment - Business Supplies Related, Norton
- Major Appliances, Norton - Household & Kitchen
- Management Consultants & Services, Norton
- Mandarin Restaurants, Norton
- Manicurists & Pedicurists, Norton
- Manufacturing, Norton
- Manufacturing Equipment & Supplies, Norton
- Manufacturing Products, Norton
- Martial Arts & Self Defense Schools, Norton
- Masonry Contractors, Norton - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Norton
- Massage Therapists & Professional, Norton
- Massage Therapy, Norton
- Medical Supplies & Equipment, Norton
- Membership Sports & Recreation Clubs, Norton
- Mental Health Specialists, Norton - Psychologist, Psychiatrist, Psychotherapist, etc
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- Metal Buildings, Norton - Kits, Homes, Steel Buildings, etc
- Metal Plating & Polishing, Norton
- Metal Stampings Manufacturers, Norton
- Metaphysical Churches, Norton
- Methodist Church, Norton
- Micro Breweries, Norton
- Mini Golf Courses, Norton
- Miscellaneous Household Item Repair, Norton
- Miscellaneous Government, Norton
- Miscellaneous Metal Work Manufacturers, Norton
- Miscellaneous Personal Services, Norton
- Miscellaneous Professional, Norton
- Mobile Home Parks & Communities , Norton
- Modular & Mobile Homes For Sale, Norton - Manufactured Homes Sale & Service
- Mortgage Bankers & Correspondents, Norton
- Motor Vehicle, Norton
- Muffler Shop & Exhaust Systems, Norton
- Museums, Norton
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