- Machine Shop, West Columbia
- Machine Shop & Tool Repair Service, West Columbia
- Machinery And Equipment Manufacturers, West Columbia
- Machinery Movers & Erectors, West Columbia
- Machinery, Supplies & Equipment - Business Production Related, West Columbia
- Machinery, Supplies & Equipment - Business Supplies Related, West Columbia
- Machinery, Supplies & Equipment - Construction & Contractor Related, West Columbia
- Mailing List Service, Brokers & Compilers, West Columbia
- Mailing, Delivery & Courier Service, West Columbia
- Maintenance, Cleaning & Sanitation, West Columbia
- Major Appliances, West Columbia - Household & Kitchen
- Malls & Shopping Centers, West Columbia
- Mammography Clinics, West Columbia - Breast Cancer Screening
- Management Consultants & Services, West Columbia
- Manicurists & Pedicurists, West Columbia
- Manifold Business Forms Manufacturers, West Columbia
- Manufactured & Mobile Home Movers & Transporting, West Columbia
- Manufacturers Agents & Representatives, West Columbia
- Manufacturers Representative, West Columbia - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, West Columbia
- Manufacturing & Industrial Consultants, West Columbia
- Manufacturing Products, West Columbia
- Marble, West Columbia
- Martial Arts & Self Defense Schools, West Columbia
- Masonry Contractors, West Columbia - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, West Columbia
- Massage Therapy, West Columbia
- Material Handling & Heavy Machinery & Equipment, West Columbia
- Material Handling Equipment, West Columbia - Conveyor Belt, Pallet Jack, Forklift, etc
- Mausoleums Developers, West Columbia
- Meat Market, Wholesale & Products, West Columbia
- Medical & Dental Management, West Columbia
- Medical & Health Service Organizations, West Columbia
- Medical & Infectious Waste Disposal, West Columbia
- Medical Billing Services, West Columbia
- Medical Management & Business Administration Service, West Columbia
- Medical Supplies & Equipment, West Columbia
- Membership Sports & Recreation Clubs, West Columbia
- Mental Health Clinics, West Columbia - Treatment Centers
- Mental Health Specialists, West Columbia - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, West Columbia
- Merchandising & Marketing Consultants, West Columbia
- Metal Buildings, West Columbia - Kits, Homes, Steel Buildings, etc
- Metal Galvanizing, West Columbia
- Metal Plating & Polishing, West Columbia
- Metal Products, West Columbia
- Metal Products, West Columbia
- Metal Repair Service & Blacksmith, West Columbia - Iron Works
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- Metal Roll Forming Manufacturers, West Columbia
- Methodist Church, West Columbia
- Mexican Restaurants, West Columbia
- Michelin Tires, West Columbia - Dealers
- Midwives, West Columbia
- Mildew Removal & Control, West Columbia - Mold Removal
- Military Supplies, West Columbia
- Millwork Contractors, West Columbia
- Mini & Self Storage, West Columbia
- Mini Golf Courses, West Columbia
- Mining, West Columbia
- Mining Equipment & Supplies, West Columbia
- Ministries Church, West Columbia
- Mirrors, West Columbia - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Household Item Repair, West Columbia
- Miscellaneous Prosthesis & Appliances, West Columbia
- Miscellaneous Agriculture, West Columbia
- Miscellaneous Business Services, West Columbia
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, West Columbia
- Miscellaneous Government, West Columbia
- Miscellaneous Manufacturing, West Columbia
- Miscellaneous Metal Work Manufacturers, West Columbia
- Miscellaneous Personal Services, West Columbia
- Miscellaneous Photographers, West Columbia
- Miscellaneous Professional, West Columbia
- Mobile Home Parks & Communities , West Columbia
- Mobile Homes for Rent & Lease, West Columbia
- Modular & Mobile Homes For Sale, West Columbia - Manufactured Homes Sale & Service
- Moldings Materials, West Columbia
- Monuments, Tombstones, Markers & Memorials, West Columbia
- Mortgage Bankers & Correspondents, West Columbia
- Mortgage Companies, West Columbia
- Mortgages & Loans, West Columbia
- Motion Picture & Television Production Services, West Columbia
- Motion Picture Pre & Post Production Services, West Columbia
- Motion Pictures Video Tape Duplication & Transfer Services, West Columbia
- Motor Vehicle, West Columbia
- Motor Vehicle Rental & Leasing, West Columbia
- Motorcycle Detailing, West Columbia
- Motorcycle Parts, Accessories & Dealers, West Columbia
- Moving Companies, West Columbia
- Moving Truck Rental , West Columbia
- Muffler Shop & Exhaust Systems, West Columbia
- Music, West Columbia
- Musical Instrument Manufacturers, West Columbia
- Musical Instruments & Equipment Stores, West Columbia
- Musical Recording Services, West Columbia
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