- Machine Shop & Tool Repair Service, Orangeburg
- Machinery, Supplies & Equipment - Business Production Related, Orangeburg
- Machinery, Supplies & Equipment - Business Supplies Related, Orangeburg
- Machinery, Supplies & Equipment - Construction & Contractor Related, Orangeburg
- Magazine & Newspaper Stands, Orangeburg - Dealers & Distributors
- Mail Delivery Service, Orangeburg
- Mailing, Delivery & Courier Service, Orangeburg
- Management Consultants & Services, Orangeburg
- Manicurists & Pedicurists, Orangeburg
- Manifold Business Forms Manufacturers, Orangeburg
- Manufacturing, Orangeburg
- Manufacturing & Industrial Consultants, Orangeburg
- Manufacturing Services, Orangeburg
- Marionettes & Puppets, Orangeburg
- Marriage & Family Counselors, Orangeburg
- Martial Arts & Self Defense Schools, Orangeburg
- Masonry Contractors, Orangeburg - Stone Mason, Brick Mason - Install & Repair
- Massage Therapists & Professional, Orangeburg
- Massage Therapy, Orangeburg
- Mechanical Engineer, Orangeburg - Mechanical Engineering Service
- Medical & Health Service Organizations, Orangeburg
- Medical Diagnostic Clinics, Orangeburg - Clinical Labs & Centers
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- Medical Research, Orangeburg
- Medical Research & Development, Orangeburg - Medical Information & Research
- Mental Health Specialists, Orangeburg - Psychologist, Psychiatrist, Psychotherapist, etc
- Mexican Restaurants, Orangeburg
- Middle Eastern Restaurants, Orangeburg
- Millwork Contractors, Orangeburg
- Mining, Orangeburg
- Miscellaneous Agriculture, Orangeburg
- Miscellaneous Business Services, Orangeburg
- Miscellaneous Government, Orangeburg
- Miscellaneous Manufacturing, Orangeburg
- Miscellaneous Personal Services, Orangeburg
- Miscellaneous Professional, Orangeburg
- Motor Vehicle, Orangeburg
- Motor Vehicle Rental & Leasing, Orangeburg
- Moving Truck Rental , Orangeburg
- Music, Orangeburg
- Music Entertainment, Orangeburg
- Music Teachers, Orangeburg
- Musical Instrument Rental, Orangeburg - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Orangeburg
- Musicians, Bands & Disc Jockeys, Orangeburg
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