- Racing Car Supplies, Caledon
- Radio & Television Repair Shops , Caledon - TV Repair
- Radio Communications Equipment & Systems , Caledon
- Ready Mix Concrete, Caledon - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Caledon
- Real Estate, Caledon - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Caledon
- Real Estate Agent - Property Lessors, Caledon
- Real Estate Broker, Caledon
- Real Estate Management, Caledon
- Real Estate Services, Caledon
- Records, Tapes, Cd & Dvd Manufacturers, Caledon
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- Records, Tapes, Compact Discs Wholesale, Caledon
- Reducing Exercise & Weight Control Services, Caledon
- Refuse Collection & Disposal Services, Caledon
- Religious Organizations, Caledon
- Repair Services, Caledon
- Resorts & Hotels, Caledon
- Restaurant Equipment Repair & Service, Caledon - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurants/Food & Dining, Caledon
- Riding & Rodeo Services, Caledon
- Roofing Consultants, Caledon - Roofing Companies
- Roofing Contractors, Caledon - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rv Parks, Caledon
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