- Racing Car Supplies, Streamwood
- Radiator Coolant & Solvents, Streamwood - Engine Coolant
- Radiator Repair, Streamwood - Gas Tank Repair
- Radiator Repair & Rebuild, Streamwood
- Radio Communications Equipment & Systems , Streamwood
- Radiotelephone Communications, Streamwood
- Ready Mix Concrete, Streamwood - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Streamwood
- Real Estate, Streamwood - Agent, Broker & Companies
- Real Estate Appraiser, Streamwood - Appraisal Services
- Real Estate Appraisers & Consulting Services, Streamwood
- Real Estate Services, Streamwood
- Red Wing Shoes, Streamwood
- Religious Organizations, Streamwood
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- Rental & Leasing Business Equipment, Streamwood
- Repair Services, Streamwood
- Research & Development Labs, Streamwood - Laboratories
- Research Services, Streamwood
- Residential, Streamwood
- Residential Apartments, Streamwood
- Residential Care Facilities, Streamwood
- Residential Construction Contractors, Streamwood - General Contractors
- Restaurant & Lounge, Bar, Or Pub, Streamwood
- Restaurants/Food & Dining, Streamwood
- Resume Service, Streamwood
- Riding & Rodeo Services, Streamwood
- Roofing Consultants, Streamwood - Roofing Companies
- Roofing Contractors, Streamwood - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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