- Racing Car Supplies, Rockford
- Radio & Tv Communications Equipment Manufacturers, Rockford
- Radiology Equipment & Services, Rockford - X-Ray Equipment & Supplies
- Real Estate, Rockford - Agent, Broker & Companies
- Real Estate Properties, Rockford
- Real Estate Recreational & Resort, Rockford
- Real Estate Services, Rockford
- Records, Tapes, CDs - Used & Vintage, Rockford
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