- Radio Equipment & Parts Stores & Dealers, Madison
- Radiotelephone Communications, Madison
- Ready Mix Concrete, Madison - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Madison
- Real Estate, Madison - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Madison
- Real Estate Appraiser, Madison - Appraisal Services
- Real Estate Appraisers & Consulting Services, Madison
- Real Estate Rentals, Madison
- Real Estate Services, Madison
- Recreational Equipment & Supplies Companies, Madison
- Recreational Services, Madison
- Refrigeration Repair & Service, Madison - Ac, Freezer, Refrigerator Repair
- Refuse Collection & Disposal Services, Madison
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- Refuse Systems & Garbage Disposal, Madison
- Rehabilitation Centers, Products & Services, Madison
- Rehabilitation Specialists, Madison
- Religious Organizations, Madison
- Rental & Leasing Business Equipment, Madison
- Repair Services, Madison
- Residential, Madison
- Residential Apartments, Madison
- Residential Care Facilities, Madison
- Residential Construction Contractors, Madison - General Contractors
- Resource Centers, Madison
- Restaurant Lobster, Madison
- Restaurants/Food & Dining, Madison
- Retirement Communities & Home, Assisted Living & Apartments, Madison
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