- Racing Including Track Operations, King
- Radiator Coolant & Solvents, King - Engine Coolant
- Radiator Repair, King - Gas Tank Repair
- Radio & Tv Communications Equipment Manufacturers, King
- Radio Stations & Broadcasting Companies, King
- Radon Testing & Services, King
- Real Estate, King - Agent, Broker & Companies
- Real Estate Developers, King
- Real Estate Services, King
- Recycling Drop-Off Centers, King
- Refrigeration & Air Conditioning Contractors, King - Installation, Repair, Sales & Service
- Rehabilitation Centers, Products & Services, King
- Rehabilitation Specialists, King
- Rehabilitational Job Training Services, King
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- Religious Education, King
- Religious Goods & Church Supplies Stores, King
- Religious Organizations, King
- Repair Services, King
- Research Services, King
- Residential, King
- Residential Apartments, King
- Residential Care Facilities, King
- Residential Real Estate Companies, King
- Restaurant Management & Consulting, King - Food Facilities Consultants
- Restaurants - Breakfast Brunch Lunch, King
- Restaurants/Food & Dining, King
- Retirement Homes, King
- Roadside Assistance, Road Service & Towing Service, King
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