- Racing Including Track Operations, Denton
- Radio & Television Repair Shops , Denton - TV Repair
- Railroad, Denton - Commuter & Passenger Transport
- Railroad Companies, Denton
- Real Estate, Denton - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Denton
- Real Estate Appraiser, Denton - Appraisal Services
- Real Estate Appraisers & Consulting Services, Denton
- Real Estate Management, Denton
- Real Estate Rentals, Denton
- Real Estate Services, Denton
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- Recreational Services, Denton
- Recycling Drop-Off Centers, Denton
- Reducing Exercise & Weight Control Services, Denton
- Religious Organizations, Denton
- Repair Services, Denton
- Residential Care Facilities, Denton
- Residential Landfills, Denton
- Restaurants/Food & Dining, Denton
- Retirement & Estate Planning, Denton
- Retirement Homes, Denton
- Retirement Planning Consultants & Services, Denton
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