- Radio Stations & Broadcasting Companies, Salem
- Radiologists, Salem - Radiology Doctors, Physicians & Surgeons
- Radiotelephone Communications, Salem
- Railroad Companies, Salem
- Ready Mix Concrete, Salem - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Salem
- Real Estate, Salem - Agent, Broker & Companies
- Real Estate Management, Salem
- Real Estate Rentals, Salem
- Real Estate Services, Salem
- Recreational Equipment & Supplies Companies, Salem
- Recreational Equipment Repair & Service, Salem
- Recycling Drop-Off Centers, Salem
- Recycling Scrap & Waste Materials, Salem - Scrap Metal, etc
- Refuse Collection & Disposal, Salem
- Refuse Collection & Disposal Services, Salem
- Refuse Systems & Garbage Disposal, Salem
- Rehabilitation Centers, Products & Services, Salem
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- Rehabilitation Specialists, Salem
- Rehabilitational Job Training Services, Salem
- Religious Education, Salem
- Religious Organizations, Salem
- Repair Services, Salem
- Residential, Salem
- Residential Apartments, Salem
- Residential Care Facilities, Salem
- Residential Construction Contractors, Salem - General Contractors
- Resins Wholesale & Retail, Salem - Plastic Raw Materials
- Restaurant & Food Service Management Services, Salem
- Restaurants/Food & Dining, Salem
- Retaining Wall Contractors, Salem - Build & Repair - Blocks, Concrete, Stones, etc
- Retirement Communities & Home, Assisted Living & Apartments, Salem
- Roofing Consultants, Salem - Roofing Companies
- Roofing Contractors, Salem - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- RV & Campers Repair & Service, Salem
- RV Repair, Salem - Recreational Vehicle
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