- Radiator Coolant & Solvents, Salem - Engine Coolant
- Radio & Tv Communications Equipment Manufacturers, Salem
- Radiologists, Salem - Radiology Doctors, Physicians & Surgeons
- Ready Mix Concrete, Salem - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Salem
- Real Estate, Salem - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Salem
- Real Estate Developers, Salem
- Real Estate Services, Salem
- Record Storage, Destruction & Management, Salem
- Recreational Organizations, Salem
- Recycling Scrap & Waste Materials, Salem - Scrap Metal, etc
- Refrigeration & Cooling Equipment, Parts & Supplies , Salem - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Salem - Ac, Freezer, Refrigerator Repair
- Refuse Collection & Disposal, Salem
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- Refuse Systems & Garbage Disposal, Salem
- Rehabilitation Centers, Salem
- Rehabilitation Specialists, Salem
- Religious Organizations, Salem
- Religious Practitioners, Salem
- Repair Services, Salem
- Residential, Salem
- Residential Apartments, Salem
- Residential Care Facilities, Salem
- Residential Construction Contractors, Salem - General Contractors
- Restaurants/Food & Dining, Salem
- Retirement Communities & Home, Assisted Living & Apartments, Salem
- Roofing Consultants, Salem - Roofing Companies
- Roofing Contractors, Salem - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rooming & Boarding Houses, Salem
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