- Machine Shop, Summerville
- Machine Shop & Tool Repair Service, Summerville
- Machine Tools , Summerville
- Machine Tools Manufacturers Metal Cutting Types, Summerville
- Machinery And Equipment Manufacturers, Summerville
- Machinery Movers & Erectors, Summerville
- Machinery, Supplies & Equipment - Business Production Related, Summerville
- Machinery, Supplies & Equipment - Business Supplies Related, Summerville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Summerville
- Magazine & Newspaper Stands, Summerville - Dealers & Distributors
- Magicians & Hypnotist Entertainers, Summerville
- Mail Delivery Service, Summerville
- Mailbox Rental Services, Summerville
- Mailing, Delivery & Courier Service, Summerville
- Major Appliances, Summerville - Household & Kitchen
- Management Consultants & Services, Summerville
- Manicurists & Pedicurists, Summerville
- Manufactured & Mobile Home Movers & Transporting, Summerville
- Manufacturers Agents & Representatives, Summerville
- Manufacturers Representative, Summerville - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Summerville
- Manufacturing & Industrial Consultants, Summerville
- Manufacturing Products, Summerville
- Manufacturing Services, Summerville
- Marble, Summerville
- Marine Supplies & Equipment, Summerville - Boat Supplies
- Market Research & Analysis , Summerville - Market Analysis, Business & Economic Research
- Marriage & Family Counselors, Summerville
- Martial Arts & Self Defense Schools, Summerville
- Masonry Contractors, Summerville - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Summerville
- Massage Therapy, Summerville
- Material Handling, Summerville
- Material Handling Consultants, Summerville
- Mausoleums Developers, Summerville
- Meat Market, Wholesale & Products, Summerville
- Meat Packers, Summerville
- Mechanical Contractors, Summerville - Install, Service & Repair
- Medical & Dental Management, Summerville
- Medical & Health Service Organizations, Summerville
- Medical Groups & Clinics, Summerville - Medical & Health Centers
- Medical Management & Business Administration Service, Summerville
- Medical Supplies & Equipment, Summerville
- Meeting & Event Planning Services, Summerville - Conference Consultants
- Membership Sports & Recreation Clubs, Summerville
- Men's Clothing Stores, Summerville - Clothes & Accessories
- Mental Health Clinics, Summerville - Treatment Centers
- Mental Health Specialists, Summerville - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Summerville
- Merchandising & Marketing Consultants, Summerville
- Metal Buildings, Summerville - Kits, Homes, Steel Buildings, etc
- Metal Repair Service & Blacksmith, Summerville - Iron Works
- Metal Roll Forming Manufacturers, Summerville
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- Methodist Church, Summerville
- Mexican Restaurants, Summerville
- Military Supplies, Summerville
- Millwork Contractors, Summerville
- Mini & Self Storage, Summerville
- Ministries Church, Summerville
- Mirrors, Summerville - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Business Product Repair, Summerville
- Miscellaneous Household Item Repair, Summerville
- Miscellaneous Agriculture, Summerville
- Miscellaneous Business Services, Summerville
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Summerville
- Miscellaneous Government, Summerville
- Miscellaneous Manufacturing, Summerville
- Miscellaneous Metal Work Manufacturers, Summerville
- Miscellaneous Motor Vehicles, Summerville
- Miscellaneous Personal Services, Summerville
- Miscellaneous Photographers, Summerville
- Miscellaneous Professional, Summerville
- Mobile Home Contractors, Summerville
- Mobile Home Improvements & Repairs, Summerville
- Mobile Home Parks & Communities , Summerville
- Mobile Homes, Summerville
- Mobile Homes Manufactures, Summerville
- Modular & Mobile Homes For Sale, Summerville - Manufactured Homes Sale & Service
- Mortgage Bankers & Correspondents, Summerville
- Mortgage Companies, Summerville
- Mortgages & Loans, Summerville
- Mosquito Control, Summerville
- Motion Pictures Video Tape Duplication & Transfer Services, Summerville
- Motor Vehicle, Summerville
- Motor Vehicle Rental & Leasing, Summerville
- Motorcycle & Motor Scooters Dealers, Repair & Service, Summerville
- Motorcycle Parts, Accessories & Dealers, Summerville
- Motorcycle Repair & Service, Summerville
- Movie Theaters, Summerville
- Moving & Storage Supplies & Equipment, Summerville
- Moving Companies, Summerville
- Moving Truck Rental , Summerville
- Mowing Service, Summerville
- Muffler Shop & Exhaust Systems, Summerville
- Mulch, Peat & Moss Products, Summerville
- Multimedia Publishers, Summerville - Multimedia Services & Systems
- Museums, Summerville
- Music, Summerville
- Music Entertainment, Summerville
- Music Lessons, Summerville
- Music Lessons - Instrumental, Summerville
- Music Lessons - Vocal, Summerville
- Musical Instruments & Equipment Stores, Summerville
- Musical Instruments Repair, Sales & Service, Summerville
- Musicians, Bands & Disc Jockeys, Summerville
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