- Machine Shop & Tool Repair Service, Greenville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Greenville
- Magazine & Newspaper Stands, Greenville - Dealers & Distributors
- Management Consultants & Services, Greenville
- Manicurists & Pedicurists, Greenville
- Manufacturing, Greenville
- Manufacturing Products, Greenville
- Marriage & Family Counselors, Greenville
- Masonry Materials & Supplies, Greenville
- Massage Therapists & Professional, Greenville
- Massage Therapy, Greenville
- Medical Supplies & Equipment, Greenville
- Membership Sports & Recreation Clubs, Greenville
- Mental & Developmental Information & Referral Services, Greenville
- Mental Health Specialists, Greenville - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Greenville
- Methodist Church, Greenville
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- Mexican Restaurants, Greenville
- Miscellaneous Government, Greenville
- Miscellaneous Personal Services, Greenville
- Miscellaneous Photographers, Greenville
- Miscellaneous Professional, Greenville
- Modular & Mobile Homes For Sale, Greenville - Manufactured Homes Sale & Service
- Mortgage Bankers & Correspondents, Greenville
- Mortgage Companies, Greenville
- Motor Vehicle, Greenville
- Motor Vehicle Rental & Leasing, Greenville
- Motorcycle & Motor Scooters Dealers, Repair & Service, Greenville
- Motorcycle Repair & Service, Greenville
- Movie Theaters, Greenville
- Moving Supplies & Equipment Rental, Greenville
- Moving Truck Rental , Greenville
- Muffler Shop & Exhaust Systems, Greenville
- Museums, Greenville
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