- Machine Shop, Spartanburg
- Machine Shop & Tool Repair Service, Spartanburg
- Machine Tools Manufacturers Metal Cutting Types, Spartanburg
- Machinery And Equipment Manufacturers, Spartanburg
- Machinery Custom Design Manufacturers, Spartanburg
- Machinery Movers & Erectors, Spartanburg
- Machinery Repair & Rebuild, Spartanburg
- Machinery, Supplies & Equipment - Business Production Related, Spartanburg
- Machinery, Supplies & Equipment - Business Supplies Related, Spartanburg
- Machinery, Supplies & Equipment - Construction & Contractor Related, Spartanburg
- Magazine & Newspaper Stands, Spartanburg - Dealers & Distributors
- Mail Delivery Service, Spartanburg
- Mailbox Rental Services, Spartanburg
- Mailing List Service, Brokers & Compilers, Spartanburg
- Mailing, Delivery & Courier Service, Spartanburg
- Maintenance, Cleaning & Sanitation, Spartanburg
- Major Appliances, Spartanburg - Household & Kitchen
- Malls & Shopping Centers, Spartanburg
- Malpractice Attorneys & Lawyers, Spartanburg
- Malpractice Attorneys & Lawyers, Spartanburg
- Malpractice Lawyers & Attorneys, Spartanburg
- Management Consultants & Services, Spartanburg
- Manicurists & Pedicurists, Spartanburg
- Manufactured & Mobile Home Movers & Transporting, Spartanburg
- Manufacturers Agents & Representatives, Spartanburg
- Manufacturers Representative, Spartanburg - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Spartanburg
- Manufacturing & Industrial Consultants, Spartanburg
- Manufacturing Products, Spartanburg
- Marine Supplies & Equipment, Spartanburg - Boat Supplies
- Market Research & Analysis , Spartanburg - Market Analysis, Business & Economic Research
- Marriage & Family Counselors, Spartanburg
- Martial Arts & Self Defense Schools, Spartanburg
- Masonry Contractors, Spartanburg - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Spartanburg
- Massage Therapists & Professional, Spartanburg
- Massage Therapy, Spartanburg
- Mastectomy Apparel, Forms, Prostheses & Supplies, Spartanburg
- Material Handling Equipment, Spartanburg - Conveyor Belt, Pallet Jack, Forklift, etc
- Mausoleums Developers, Spartanburg
- Meat Market, Wholesale & Products, Spartanburg
- Mechanical Contractors, Spartanburg - Install, Service & Repair
- Mechanical Engineer, Spartanburg - Mechanical Engineering Service
- Medical & Dental Management, Spartanburg
- Medical & Health Service Organizations, Spartanburg
- Medical Business Management Services, Spartanburg
- Medical Diagnostic Clinics, Spartanburg - Clinical Labs & Centers
- Medical Diagnostic Imaging, Spartanburg
- Medical Equipment & Supplies Rental & Leasing, Spartanburg
- Medical Equipment, Supplies, Devices & Instruments - Repair & Service, Spartanburg
- Medical Groups & Clinics, Spartanburg - Medical & Health Centers
- Medical Management & Business Administration Service, Spartanburg
- Medical Research, Spartanburg
- Medical Research & Development, Spartanburg - Medical Information & Research
- Medical Supplies & Equipment, Spartanburg
- Medical Transcription Service, Spartanburg
- Mediterranean Restaurants, Spartanburg
- Meeting & Event Planning Services, Spartanburg - Conference Consultants
- Membership Sports & Recreation Clubs, Spartanburg
- Men's Clothing Stores, Spartanburg - Clothes & Accessories
- Mental Health Clinics, Spartanburg - Treatment Centers
- Mental Health Specialists, Spartanburg - Psychologist, Psychiatrist, Psychotherapist, etc
- Mental Retardation & Developmentally Disabled Services, Spartanburg
- Merchandise Sales Events, Spartanburg
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- Merchandising & Marketing Consultants, Spartanburg
- Merchandising & Pricing Equipment, Spartanburg
- Merle Norman Cosmetics, Spartanburg
- Metal Buildings, Spartanburg - Kits, Homes, Steel Buildings, etc
- Metal Coating & Allied Services, Spartanburg
- Metal Cutting Services, Spartanburg
- Metal Plating & Polishing, Spartanburg
- Metal Products, Spartanburg
- Metal Products, Spartanburg
- Metal Repair Service & Blacksmith, Spartanburg - Iron Works
- Metal Working Machinery, Spartanburg
- Metaphysical Churches, Spartanburg
- Methodist Church, Spartanburg
- Mexican Restaurants, Spartanburg
- Mildew Removal & Control, Spartanburg - Mold Removal
- Millwrights, Spartanburg
- Mini & Self Storage, Spartanburg
- Mining, Spartanburg
- Ministries Church, Spartanburg
- Miscellaneous Business Product Repair, Spartanburg
- Miscellaneous Household Item Repair, Spartanburg
- Miscellaneous Prosthesis & Appliances, Spartanburg
- Miscellaneous Agriculture, Spartanburg
- Miscellaneous Business Services, Spartanburg
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Spartanburg
- Miscellaneous Government, Spartanburg
- Miscellaneous Industry, Spartanburg
- Miscellaneous Manufacturing, Spartanburg
- Miscellaneous Personal Services, Spartanburg
- Miscellaneous Photographers, Spartanburg
- Miscellaneous Professional, Spartanburg
- Mobile Home Parks & Communities , Spartanburg
- Mobile Homes, Spartanburg
- Mobile Homes Manufactures, Spartanburg
- Modular & Mobile Homes For Sale, Spartanburg - Manufactured Homes Sale & Service
- Modular Buildings, Spartanburg - Modular Homes Buildings & Offices
- Moisture & Vapor Control, Spartanburg
- Monuments, Tombstones, Markers & Memorials, Spartanburg
- Mortgage Bankers & Correspondents, Spartanburg
- Mortgage Companies, Spartanburg
- Mortgages & Loans, Spartanburg
- Morticians & Mortician Services, Spartanburg
- Mosquito Control, Spartanburg
- Motor Vehicle, Spartanburg
- Motor Vehicle Rental & Leasing, Spartanburg
- Motorcycle & Motor Scooters Dealers, Repair & Service, Spartanburg
- Motorcycle Parts, Accessories & Dealers, Spartanburg
- Motorcycle Repair & Service, Spartanburg
- Movie Theaters, Spartanburg
- Moving & Storage Supplies & Equipment, Spartanburg
- Moving Companies, Spartanburg
- Moving Supplies & Equipment Rental, Spartanburg
- Moving Truck Rental , Spartanburg
- Muffler Shop & Exhaust Systems, Spartanburg
- Mulch, Peat & Moss Products, Spartanburg
- Multimedia Publishers, Spartanburg - Multimedia Services & Systems
- Music, Spartanburg
- Music Lessons, Spartanburg
- Music Lessons - Instrumental, Spartanburg
- Musical Instrument Rental, Spartanburg - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Spartanburg
- Musical Instruments Repair, Sales & Service, Spartanburg
- Musical Recording Services, Spartanburg
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