- Race Tracks, Madison
- Railroad Services, Madison
- Railroad Used Cars, Madison
- Ready Mix Concrete, Madison - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Madison
- Real Estate, Madison - Agent, Broker & Companies
- Real Estate Rentals, Madison
- Real Estate Services, Madison
- Real Estate Services Franchises, Madison
- Recycling Drop-Off Centers, Madison
- Recycling Scrap & Waste Materials, Madison - Scrap Metal, etc
- Refrigerated Storage & Warehouse, Madison - Warehousing
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- Religious Organizations, Madison
- Repair Services, Madison
- Research & Development Bureaus, Madison - Commercial, Economic, Sociological & Educational Research
- Research Services, Madison
- Residential, Madison
- Residential Apartments, Madison
- Restaurant Management & Consulting, Madison - Food Facilities Consultants
- Restaurants/Food & Dining, Madison
- Roadside Assistance, Road Service & Towing Service, Madison
- Roofing Consultants, Madison - Roofing Companies
- Roofing Contractors, Madison - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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