- Radiator Coolant & Solvents, Aurora - Engine Coolant
- Radio & Television Repair Shops , Aurora - TV Repair
- Radio Communications Equipment & Systems , Aurora
- Radio Stations & Broadcasting Companies, Aurora
- Railroad & Subway Construction Contractors, Aurora
- Railroad Contractors, Aurora
- Ready Mix Concrete, Aurora - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Aurora
- Real Estate, Aurora - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Aurora
- Real Estate Agent - Property Lessors, Aurora
- Real Estate Appraiser, Aurora - Appraisal Services
- Real Estate Appraisers & Consulting Services, Aurora
- Real Estate Broker, Aurora
- Real Estate Consultants, Aurora
- Real Estate Developers, Aurora
- Real Estate Management, Aurora
- Real Estate Properties, Aurora
- Real Estate Property Investment Properties, Aurora
- Real Estate Rentals, Aurora
- Real Estate Services, Aurora
- Record Storage, Destruction & Management, Aurora
- Recording Studio - Equipment & Rental, Aurora
- Recreational Equipment & Supplies Companies, Aurora
- Recreational Good Manufacturers, Aurora
- Recreational Services, Aurora
- Recycling Scrap & Waste Materials, Aurora - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Aurora
- Refrigeration & Air Conditioning Contractors, Aurora - Installation, Repair, Sales & Service
- Refrigeration & Cooling Equipment, Parts & Supplies , Aurora - Water Cooler, Ice Machine, Beverage Dispenser, etc
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- Refrigeration Repair & Service, Aurora - Ac, Freezer, Refrigerator Repair
- Refuse Collection & Disposal Services, Aurora
- Refuse Systems & Garbage Disposal, Aurora
- Rehabilitation Centers, Products & Services, Aurora
- Rehabilitation Specialists, Aurora
- Rehabilitational Job Training Services, Aurora
- Religious Organizations, Aurora
- Rental & Leasing Business Equipment, Aurora
- Repair Services, Aurora
- Reprographic Services, Aurora
- Research & Development Bureaus, Aurora - Commercial, Economic, Sociological & Educational Research
- Research Services, Aurora
- Residential, Aurora
- Residential Apartments, Aurora
- Residential Care Facilities, Aurora
- Restaurant & Food Service Management Services, Aurora
- Restaurant Equipment & Supplies, Aurora
- Restaurants - Breakfast Brunch Lunch, Aurora
- Restaurants/Food & Dining, Aurora
- Resume Service, Aurora
- Retirement Communities & Home, Assisted Living & Apartments, Aurora
- Riding & Rodeo Services, Aurora
- Riding Apparel & Equipment, Aurora
- Road Construction, Aurora - Companies & Contractors
- Road Construction & Repair Contractors, Aurora
- Roadside Assistance, Road Service & Towing Service, Aurora
- Robots & Robotics System, Aurora
- Roofing Consultants, Aurora - Roofing Companies
- Roofing Contractors, Aurora - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rubber Products - Retail, Aurora
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