- Machine Shop, Rural Retreat
- Machinery, Supplies & Equipment - Construction & Contractor Related, Rural Retreat
- Mail Delivery Service, Rural Retreat
- Malls & Shopping Centers, Rural Retreat
- Manufacturing, Rural Retreat
- Manufacturing Products, Rural Retreat
- Meat Cutting Services, Rural Retreat
- Meat Market, Wholesale & Products, Rural Retreat
- Meat Packers, Rural Retreat
- Medical Supplies & Equipment, Rural Retreat
- Membership Sports & Recreation Clubs, Rural Retreat
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- Metal Plating & Polishing, Rural Retreat
- Methodist Church, Rural Retreat
- Mexican Restaurants, Rural Retreat
- Mini & Self Storage, Rural Retreat
- Mining Equipment & Supplies, Rural Retreat
- Miscellaneous Government, Rural Retreat
- Miscellaneous Personal Services, Rural Retreat
- Mortgages & Loans, Rural Retreat
- Motor Vehicle, Rural Retreat
- Motor Vehicle Rental & Leasing, Rural Retreat
- Moving Truck Rental , Rural Retreat
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