- Radio & Television Repair Shops , Sudbury - TV Repair
- Real Estate, Sudbury - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Sudbury
- Real Estate Appraiser, Sudbury - Appraisal Services
- Real Estate Appraisers & Consulting Services, Sudbury
- Real Estate Developers, Sudbury
- Real Estate Management, Sudbury
- Real Estate Services, Sudbury
- Recycling Scrap & Waste Materials, Sudbury - Scrap Metal, etc
- Reform Synagogues, Sudbury
- Rehabilitation Centers, Products & Services, Sudbury
- Rehabilitation Specialists, Sudbury
- Religious Organizations, Sudbury
- Repair Services, Sudbury
- Research & Development Bureaus, Sudbury - Commercial, Economic, Sociological & Educational Research
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- Research Services, Sudbury
- Residential Care Facilities, Sudbury
- Residential Construction Contractors, Sudbury - General Contractors
- Restaurant & Food Service Management Services, Sudbury
- Restaurants/Food & Dining, Sudbury
- Retail Book Stores, Sudbury
- Retirement & Estate Planning, Sudbury
- Retirement Communities & Home, Assisted Living & Apartments, Sudbury
- Retirement Planning Consultants & Services, Sudbury
- Riding & Rodeo Services, Sudbury
- Roadside Assistance, Road Service & Towing Service, Sudbury
- Rock Splitting, Sudbury
- Roofing Consultants, Sudbury - Roofing Companies
- Roofing Contractors, Sudbury - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Sudbury
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