- Radiator Coolant & Solvents, East Chicago - Engine Coolant
- Radiator Repair, East Chicago - Gas Tank Repair
- Radiator Repair & Rebuild, East Chicago
- Radiologists, East Chicago - Radiology Doctors, Physicians & Surgeons
- Railroad, East Chicago - Commuter & Passenger Transport
- Railroad & Subway Construction Contractors, East Chicago
- Railroad Car Leasing Services, East Chicago
- Railroad Companies, East Chicago
- Railroad Contractors, East Chicago
- Railroad Equipment & Supplies Manufacturers, East Chicago
- Railroad Services, East Chicago
- Ready Mix Concrete, East Chicago - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, East Chicago
- Real Estate, East Chicago - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, East Chicago
- Real Estate Management, East Chicago
- Real Estate Services, East Chicago
- Records, Tapes, Cd & Dvd Manufacturers, East Chicago
- Records, Tapes, Compact Discs Wholesale, East Chicago
- Recreational Services, East Chicago
- Recycling Drop-Off Centers, East Chicago
- Recycling Scrap & Waste Materials, East Chicago - Scrap Metal, etc
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- Rehabilitation Centers, Products & Services, East Chicago
- Rehabilitation Specialists, East Chicago
- Religious Education, East Chicago
- Religious Goods & Church Supplies Stores, East Chicago
- Religious Organizations, East Chicago
- Religious Practitioners, East Chicago
- Repair Services, East Chicago
- Research Services, East Chicago
- Residential, East Chicago
- Residential Apartments, East Chicago
- Residential Care Facilities, East Chicago
- Resins Wholesale & Retail, East Chicago - Plastic Raw Materials
- Restaurant & Lounge, Bar, Or Pub, East Chicago
- Restaurant Equipment, East Chicago
- Restaurant Equipment & Supplies, East Chicago
- Restaurant Supplies & Equipment, East Chicago
- Restaurants/Food & Dining, East Chicago
- Retreat Facilities & Houses, East Chicago
- Road Construction, East Chicago - Companies & Contractors
- Road Construction & Repair Contractors, East Chicago
- Roast Beef Restaurants, East Chicago
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