- Machine Shop, Parkville
- Machinery, Supplies & Equipment - Business Production Related, Parkville
- Machinery, Supplies & Equipment - Business Supplies Related, Parkville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Parkville
- Mail Delivery Service, Parkville
- Maintenance, Cleaning & Sanitation, Parkville
- Major Appliances, Parkville - Household & Kitchen
- Malls & Shopping Centers, Parkville
- Management Consultants & Services, Parkville
- Manicurists & Pedicurists, Parkville
- Manufacturers Agents & Representatives, Parkville
- Manufacturers Representative, Parkville - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Parkville
- Manufacturing Products, Parkville
- Markets & Grocers Equipment, Parkville
- Marriage & Family Counselors, Parkville
- Martial Arts & Self Defense Schools, Parkville
- Masonry Contractors, Parkville - Stone Mason, Brick Mason - Install & Repair
- Masonry Contractors Commercial & Industrial, Parkville
- Massage Therapists & Professional, Parkville
- Massage Therapy, Parkville
- Mastectomy Apparel, Forms, Prostheses & Supplies, Parkville
- Meat Market, Wholesale & Products, Parkville
- Mechanical Contractors, Parkville - Install, Service & Repair
- Mechanical Engineer, Parkville - Mechanical Engineering Service
- Medical Diagnostic Clinics, Parkville - Clinical Labs & Centers
- Medical Groups & Clinics, Parkville - Medical & Health Centers
- Medical Records Service , Parkville
- Medical Supplies & Equipment, Parkville
- Membership Sports & Recreation Clubs, Parkville
- Mental Health Specialists, Parkville - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Parkville
- Metal Repair Service & Blacksmith, Parkville - Iron Works
- Methodist Church, Parkville
- Mexican Food & Goods Products, Parkville
- Mexican Restaurants, Parkville
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- Middle Eastern Restaurants, Parkville
- Mildew Removal & Control, Parkville - Mold Removal
- Mini & Self Storage, Parkville
- Ministers, Parkville
- Ministries Church, Parkville
- Mirrors, Parkville - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Business Product Repair, Parkville
- Miscellaneous Household Item Repair, Parkville
- Miscellaneous Agriculture, Parkville
- Miscellaneous Government, Parkville
- Miscellaneous Manufacturing, Parkville
- Miscellaneous Personal Services, Parkville
- Miscellaneous Photographers, Parkville
- Miscellaneous Professional, Parkville
- Money Counting & Wrapping, Parkville
- Mortgage Bankers & Correspondents, Parkville
- Mortgage Companies, Parkville
- Mortgages & Loans, Parkville
- Mortgages Commercial & Industrial, Parkville
- Moss Removal & Control, Parkville
- Motion Picture Pre & Post Production Services, Parkville
- Motor Sports, Parkville
- Motor Vehicle, Parkville
- Motor Vehicle Rental & Leasing, Parkville
- Moving Companies, Parkville
- Moving Supplies & Equipment Rental, Parkville
- Moving Truck Rental , Parkville
- Muffler Shop & Exhaust Systems, Parkville
- Mulch, Peat & Moss Products, Parkville
- Music, Parkville
- Music Lessons, Parkville
- Music Lessons - Instrumental, Parkville
- Musical Instrument Rental, Parkville - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Parkville
- Musical Instruments Repair, Sales & Service, Parkville
- Musical Recording Services, Parkville
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