- Racing Car Supplies, Louisville
- Radio & Television Repair Shops , Louisville - TV Repair
- Radio Stations & Broadcasting Companies, Louisville
- Real Estate, Louisville - Agent, Broker & Companies
- Real Estate Appraiser, Louisville - Appraisal Services
- Real Estate Appraisers & Consulting Services, Louisville
- Real Estate Developers, Louisville
- Real Estate Management, Louisville
- Real Estate Properties, Louisville
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- Recycling Scrap & Waste Materials, Louisville - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Louisville
- Refrigerator & Freezer Equipment, Parts & Supplies, Louisville
- Rehabilitation Centers, Products & Services, Louisville
- Rehabilitation Specialists, Louisville
- Religious Education, Louisville
- Religious Organizations, Louisville
- Rental & Leasing Business Equipment, Louisville
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- Repair Services, Louisville
- Research & Development Bureaus, Louisville - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Louisville - Laboratories
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- Residential, Louisville
- Residential Apartments, Louisville
- Residential Care Facilities, Louisville
- Residential Construction Contractors, Louisville - General Contractors
- Restaurant & Lounge, Bar, Or Pub, Louisville
- Restaurant Management & Consulting, Louisville - Food Facilities Consultants
- Restaurants/Food & Dining, Louisville
- Retail Book Stores, Louisville
- Retirement & Estate Planning, Louisville
- Retirement Communities & Home, Assisted Living & Apartments, Louisville
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- Roofing Consultants, Louisville - Roofing Companies
- Roofing Contractors, Louisville - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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