- Machinery, Supplies & Equipment - Construction & Contractor Related, Oley
- Management Consultants & Services, Oley
- Manufacturing, Oley
- Masonry Contractors, Oley - Stone Mason, Brick Mason - Install & Repair
- Meat Market, Wholesale & Products, Oley
- Mennonite Church, Oley
- Merchandise Sales Events, Oley
- Metal Goods Alloys, Oley
- Metal Repair Service & Blacksmith, Oley - Iron Works
- Metal Working Machinery, Oley
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- Miscellaneous Government, Oley
- Miscellaneous Personal Services, Oley
- Miscellaneous Professional, Oley
- Money Transfer Service, Oley
- Motion Picture & Television Production Services, Oley
- Motion Picture Dists Exchanges & Representatives, Oley
- Motor Vehicle, Oley
- Motorcycle & Motor Scooters Dealers, Repair & Service, Oley
- Motorcycle Repair & Service, Oley
- Mulch, Peat & Moss Products, Oley
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