- Radon Testing & Services, Johnston
- Ready Mix Concrete, Johnston - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Johnston
- Real Estate, Johnston - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Johnston
- Real Estate Appraiser, Johnston - Appraisal Services
- Real Estate Appraisers & Consulting Services, Johnston
- Real Estate Developers, Johnston
- Real Estate Management, Johnston
- Real Estate Services, Johnston
- Recycling Scrap & Waste Materials, Johnston - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Johnston
- Refuse Collection & Disposal Services, Johnston
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- Rehabilitation Centers, Products & Services, Johnston
- Rehabilitation Specialists, Johnston
- Religious Organizations, Johnston
- Repair Services, Johnston
- Research Services, Johnston
- Residential, Johnston
- Residential Apartments, Johnston
- Residential Care Facilities, Johnston
- Residential Construction Contractors, Johnston - General Contractors
- Restaurants/Food & Dining, Johnston
- Retirement & Estate Planning, Johnston
- Retirement Communities & Home, Assisted Living & Apartments, Johnston
- Retirement Planning Consultants & Services, Johnston
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