- Maintenance, Cleaning & Sanitation, Lovettsville
- Management Consultants & Services, Lovettsville
- Manufacturing, Lovettsville
- Methodist Church, Lovettsville
- Mildew Removal & Control, Lovettsville - Mold Removal
- Miscellaneous Business Product Repair, Lovettsville
- Miscellaneous Government, Lovettsville
- Miscellaneous Personal Services, Lovettsville
- Miscellaneous Professional, Lovettsville
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- Mortgages & Loans, Lovettsville
- Motor Vehicle, Lovettsville
- Motor Vehicle Rental & Leasing, Lovettsville
- Moving & Storage Supplies & Equipment, Lovettsville
- Moving Truck Rental , Lovettsville
- Music, Lovettsville
- Music Lessons, Lovettsville
- Music Lessons - Instrumental, Lovettsville
- Musical Instruments Repair, Sales & Service, Lovettsville
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