- Radio & Television Repair Shops , Carpentersville - TV Repair
- Radio Stations & Broadcasting Companies, Carpentersville
- Radiology Equipment & Services, Carpentersville - X-Ray Equipment & Supplies
- Real Estate, Carpentersville - Agent, Broker & Companies
- Real Estate Appraiser, Carpentersville - Appraisal Services
- Real Estate Appraisers & Consulting Services, Carpentersville
- Real Estate Management, Carpentersville
- Real Estate Services, Carpentersville
- Reducing Exercise & Weight Control Services, Carpentersville
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- Reformed Churches, Carpentersville
- Religious Organizations, Carpentersville
- Repair Services, Carpentersville
- Research & Development Bureaus, Carpentersville - Commercial, Economic, Sociological & Educational Research
- Research Services, Carpentersville
- Residential, Carpentersville
- Residential Apartments, Carpentersville
- Residential Construction Contractors, Carpentersville - General Contractors
- Restaurants/Food & Dining, Carpentersville
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