- Mailing List Service, Brokers & Compilers, Parkville
- Management Consultants & Services, Parkville
- Manicurists & Pedicurists, Parkville
- Manufacturing, Parkville
- Masonry Contractors, Parkville - Stone Mason, Brick Mason - Install & Repair
- Medical Alert Systems, Parkville - Medical Alarms - PERS
- Medical Supplies & Equipment, Parkville
- Membership Sports & Recreation Clubs, Parkville
- Mental Health Clinics, Parkville - Treatment Centers
- Methodist Church, Parkville
- Mexican Restaurants, Parkville
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- Mini Golf Courses, Parkville
- Miscellaneous Agriculture, Parkville
- Miscellaneous Business Services, Parkville
- Miscellaneous Government, Parkville
- Miscellaneous Photographers, Parkville
- Miscellaneous Professional, Parkville
- Mortgage Bankers & Correspondents, Parkville
- Motion Picture Pre & Post Production Services, Parkville
- Motor Vehicle, Parkville
- Music, Parkville
- Musical Instruments & Equipment Stores, Parkville
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