- Machine Shop & Tool Repair Service, St George
- Machinery, Supplies & Equipment - Construction & Contractor Related, St George
- Major Appliances, St George - Household & Kitchen
- Management Consultants & Services, St George
- Manufacturing, St George
- Masonry Materials & Supplies, St George
- Massage Therapists & Professional, St George
- Massage Therapy, St George
- Medical Alert Systems, St George - Medical Alarms - PERS
- Medical Supplies & Equipment, St George
- Membership Sports & Recreation Clubs, St George
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- Mental Health Specialists, St George - Psychologist, Psychiatrist, Psychotherapist, etc
- Mining, St George
- Mining Contractors, St George - Mining Companies, Contractors & Brokers
- Mining, Crude-Oil Production, St George - Mining Companies
- Miscellaneous Agriculture, St George
- Miscellaneous Personal Services, St George
- Miscellaneous Professional, St George
- Modular & Mobile Homes For Sale, St George - Manufactured Homes Sale & Service
- Mortgage Bankers & Correspondents, St George
- Motor Vehicle, St George
- Motor Vehicle Rental & Leasing, St George
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