- Machine Shop, Greenville
- Machine Shop & Tool Repair Service, Greenville
- Machinery, Supplies & Equipment - Business Production Related, Greenville
- Machinery, Supplies & Equipment - Business Supplies Related, Greenville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Greenville
- Mail Delivery Service, Greenville
- Major Appliances, Greenville - Household & Kitchen
- Malls & Shopping Centers, Greenville
- Malpractice Attorneys & Lawyers, Greenville
- Malpractice Attorneys & Lawyers, Greenville
- Malpractice Lawyers & Attorneys, Greenville
- Management Consultants & Services, Greenville
- Manicurists & Pedicurists, Greenville
- Manufactured & Mobile Home Movers & Transporting, Greenville
- Manufacturing, Greenville
- Manufacturing Products, Greenville
- Marinas & Marina Services, Greenville
- Marine Animals & Fish, Greenville
- Marine Contractors & Designers, Greenville
- Marine Electronic Equipment, Greenville
- Marine Equipment Supplies & Service, Greenville
- Marine Products And Services, Greenville
- Marine Radar, Radio & Telephone, Greenville
- Marine Repair & Service Stations, Greenville
- Marine Services, Greenville
- Marine Supplies & Equipment, Greenville - Boat Supplies
- Marine Supplies & Equipment Repair, Greenville - Boat Supplies & Equipment
- Marriage & Family Counselors, Greenville
- Marriage Certificates, Greenville
- Martial Arts & Self Defense Schools, Greenville
- Masonry Materials & Supplies, Greenville
- Material Handling Equipment, Greenville - Conveyor Belt, Pallet Jack, Forklift, etc
- Meat Market, Wholesale & Products, Greenville
- Mechanical Contractors, Greenville - Install, Service & Repair
- Medical & Dental Management, Greenville
- Medical Business Management Services, Greenville
- Medical Equipment Manufacturers, Greenville
- Medical Groups & Clinics, Greenville - Medical & Health Centers
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- Medical Management & Business Administration Service, Greenville
- Medical Supplies & Equipment, Greenville
- Membership Sports & Recreation Clubs, Greenville
- Men's Clothing Stores, Greenville - Clothes & Accessories
- Mental Health Clinics, Greenville - Treatment Centers
- Mental Health Specialists, Greenville - Psychologist, Psychiatrist, Psychotherapist, etc
- Merle Norman Cosmetics, Greenville
- Metal Buildings, Greenville - Wood Buildings
- Metal Buildings, Greenville - Kits, Homes, Steel Buildings, etc
- Methodist Church, Greenville
- Mexican Restaurants, Greenville
- Mini & Self Storage, Greenville
- Mining, Greenville
- Miscellaneous Household Item Repair, Greenville
- Miscellaneous Prosthesis & Appliances, Greenville
- Miscellaneous Business Services, Greenville
- Miscellaneous Government, Greenville
- Miscellaneous Personal Services, Greenville
- Miscellaneous Photographers, Greenville
- Miscellaneous Professional, Greenville
- Mission Churches, Greenville
- Mobile Home Insurance, Greenville
- Modular & Mobile Homes For Sale, Greenville - Manufactured Homes Sale & Service
- Moisture & Vapor Control, Greenville
- Monuments, Tombstones, Markers & Memorials, Greenville
- Mortgage Bankers & Correspondents, Greenville
- Mosquito Control, Greenville
- Motor Vehicle, Greenville
- Motor Vehicle Rental & Leasing, Greenville
- Motorcycle Parts, Accessories & Dealers, Greenville
- Movie Theaters, Greenville
- Moving Companies, Greenville
- Moving Supplies & Equipment Rental, Greenville
- Moving Truck Rental , Greenville
- Muffler Shop & Exhaust Systems, Greenville
- Music, Greenville
- Musical Instruments & Equipment Stores, Greenville
- Musical Instruments Repair, Sales & Service, Greenville
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