- Racing Car Supplies, West Chicago
- Radio & Television Repair Shops , West Chicago - TV Repair
- Radio Stations & Broadcasting Companies, West Chicago
- Radiologists, West Chicago - Radiology Doctors, Physicians & Surgeons
- Radiotelephone Communications, West Chicago
- Radon Testing & Services, West Chicago
- Railroad, West Chicago - Commuter & Passenger Transport
- Railroad Companies, West Chicago
- Ready Mix Concrete, West Chicago - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, West Chicago
- Real Estate, West Chicago - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, West Chicago
- Real Estate Appraisers & Consulting Services, West Chicago
- Real Estate Consultants, West Chicago
- Real Estate Management, West Chicago
- Real Estate Services, West Chicago
- Records, Tapes, CDs - Used & Vintage, West Chicago
- Recycling Drop-Off Centers, West Chicago
- Recycling Scrap & Waste Materials, West Chicago - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, West Chicago
- Reformed Churches, West Chicago
- Refrigerated Storage & Warehouse, West Chicago - Warehousing
- Refrigerated Truck, West Chicago
- Refrigeration & Cooling Equipment, Parts & Supplies , West Chicago - Water Cooler, Ice Machine, Beverage Dispenser, etc
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- Refrigeration Repair & Service, West Chicago - Ac, Freezer, Refrigerator Repair
- Refuse Collection & Disposal Services, West Chicago
- Refuse Systems & Garbage Disposal, West Chicago
- Religious Goods & Church Supplies Stores, West Chicago
- Religious Organizations, West Chicago
- Repair Services, West Chicago
- Research & Development Labs, West Chicago - Laboratories
- Research Services, West Chicago
- Residential, West Chicago
- Residential Apartments, West Chicago
- Residential Care Facilities, West Chicago
- Residential Construction Contractors, West Chicago - General Contractors
- Restaurant Equipment, West Chicago
- Restaurant Equipment & Supplies, West Chicago
- Restaurant Supplies & Equipment, West Chicago
- Restaurants/Food & Dining, West Chicago
- Road Construction, West Chicago - Companies & Contractors
- Road Construction & Repair Contractors, West Chicago
- Roofing & Siding Materials, Equipments & Supplies, West Chicago - Wholesale, Manufacturers & Suppliers
- Roofing & Siding Veneers, West Chicago
- Roofing Consultants, West Chicago - Roofing Companies
- Roofing Contractors, West Chicago - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, West Chicago
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