- Machine Shop & Tool Repair Service, Slatington
- Machinery, Supplies & Equipment - Business Production Related, Slatington
- Management Consultants & Services, Slatington
- Manufacturing, Slatington
- Manufacturing Products, Slatington
- Martial Arts & Self Defense Schools, Slatington
- Metal Repair Service & Blacksmith, Slatington - Iron Works
- Methodist Church, Slatington
- Millwork Contractors, Slatington
- Mini & Self Storage, Slatington
- Miscellaneous Household Item Repair, Slatington
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- Miscellaneous Government, Slatington
- Miscellaneous Personal Services, Slatington
- Mobile Home Parks & Communities , Slatington
- Modular & Mobile Homes For Sale, Slatington - Manufactured Homes Sale & Service
- Mortgage Bankers & Correspondents, Slatington
- Mortgages & Loans, Slatington
- Motor Vehicle, Slatington
- Motor Vehicle Rental & Leasing, Slatington
- Moving Truck Rental , Slatington
- Mulch, Peat & Moss Products, Slatington
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