- Racing Including Track Operations, Dundas
- Real Estate, Dundas - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Dundas
- Real Estate Agent - Property Lessors, Dundas
- Real Estate Appraiser, Dundas - Appraisal Services
- Real Estate Appraisers & Consulting Services, Dundas
- Real Estate Broker, Dundas
- Real Estate Developers, Dundas
- Real Estate Management, Dundas
- Real Estate Services, Dundas
- Recording Studio - Equipment & Rental, Dundas
- Records, Tapes, CDs - Used & Vintage, Dundas
- Recycling Scrap & Waste Materials, Dundas - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Dundas
- Reformed Churches, Dundas
- Refuse Collection & Disposal Services, Dundas
- Refuse Systems & Garbage Disposal, Dundas
- Rehabilitation Centers, Products & Services, Dundas
- Rehabilitation Specialists, Dundas
- Religious Education, Dundas
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- Religious Organizations, Dundas
- Rendering Companies, Dundas
- Repair Services, Dundas
- Research Services, Dundas
- Residential, Dundas
- Residential Apartments, Dundas
- Residential Architect, Dundas
- Residential Care Facilities, Dundas
- Residential Construction Contractors, Dundas - General Contractors
- Restaurant Equipment, Dundas
- Restaurant Equipment & Supplies, Dundas
- Restaurant Supplies & Equipment, Dundas
- Restaurants/Food & Dining, Dundas
- Retirement Communities & Home, Assisted Living & Apartments, Dundas
- Retirement Homes, Dundas
- Riding & Rodeo Services, Dundas
- Roofing Consultants, Dundas - Roofing Companies
- Roofing Contractors, Dundas - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rubber Products, Dundas
- Rubber Stamps, Dundas
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