- Machine Shop & Tool Repair Service, Boyertown
- Machinery, Supplies & Equipment - Business Production Related, Boyertown
- Machinery, Supplies & Equipment - Business Supplies Related, Boyertown
- Machinery, Supplies & Equipment - Construction & Contractor Related, Boyertown
- Mailing, Delivery & Courier Service, Boyertown
- Major Appliances, Boyertown - Household & Kitchen
- Management Consultants & Services, Boyertown
- Manicurists & Pedicurists, Boyertown
- Manifold Business Forms Manufacturers, Boyertown
- Manufacturing, Boyertown
- Manufacturing Products, Boyertown
- Marriage & Family Counselors, Boyertown
- Martial Arts & Self Defense Schools, Boyertown
- Masonry Contractors, Boyertown - Stone Mason, Brick Mason - Install & Repair
- Material Handling Equipment, Boyertown - Conveyor Belt, Pallet Jack, Forklift, etc
- Mechanical Contractors, Boyertown - Install, Service & Repair
- Mechanical Engineer, Boyertown - Mechanical Engineering Service
- Medical Diagnostic Clinics, Boyertown - Clinical Labs & Centers
- Medical Supplies & Equipment, Boyertown
- Membership Sports & Recreation Clubs, Boyertown
- Mennonite Church, Boyertown
- Mental Health Specialists, Boyertown - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Boyertown
- Messenger Service, Boyertown - Message Receiving & Forwarding Service
- Metal Doors Sash & Trim Manufacturers, Boyertown
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- Metal Repair Service & Blacksmith, Boyertown - Iron Works
- Millwork Contractors, Boyertown
- Miscellaneous Retail Stores, Boyertown
- Miscellaneous Agriculture, Boyertown
- Miscellaneous Government, Boyertown
- Miscellaneous Manufacturing, Boyertown
- Miscellaneous Personal Services, Boyertown
- Miscellaneous Professional, Boyertown
- Modular & Mobile Homes For Sale, Boyertown - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Boyertown
- Mortgage Bankers & Correspondents, Boyertown
- Mortgages & Loans, Boyertown
- Motor Vehicle, Boyertown
- Motorcycle Parts, Accessories & Dealers, Boyertown
- Movie Theaters, Boyertown
- Multimedia Publishers, Boyertown - Multimedia Services & Systems
- Museums, Boyertown
- Music, Boyertown
- Music Lessons, Boyertown
- Music Lessons - Instrumental, Boyertown
- Music Schools, Boyertown
- Musical Instrument Rental, Boyertown - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Boyertown
- Musical Instruments Repair, Sales & Service, Boyertown
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