- Radio & Television Repair Shops , Ontario - TV Repair
- Radio Stations & Broadcasting Companies, Ontario
- Radiologists, Ontario - Radiology Doctors, Physicians & Surgeons
- Railroad Companies, Ontario
- Real Estate, Ontario - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Ontario
- Real Estate Appraiser, Ontario - Appraisal Services
- Real Estate Appraisers & Consulting Services, Ontario
- Real Estate Developers, Ontario
- Real Estate Services, Ontario
- Record Destruction Service, Ontario
- Record Storage, Destruction & Management, Ontario
- Reducing Exercise & Weight Control Services, Ontario
- Refrigerated Beverage Dispenser, Ontario - Water Coolers Equipment & Supplies
- Refrigeration & Cooling Equipment, Parts & Supplies , Ontario - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Ontario - Ac, Freezer, Refrigerator Repair
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- Religious Organizations, Ontario
- Rental & Leasing Business Equipment, Ontario
- Repair Services, Ontario
- Research Services, Ontario
- Residential, Ontario
- Residential Apartments, Ontario
- Residential Care Facilities, Ontario
- Restaurant Equipment, Ontario
- Restaurant Equipment & Supplies, Ontario
- Restaurant Equipment & Supplies Manufacturers, Ontario
- Restaurant Lobster, Ontario
- Restaurant Supplies & Equipment, Ontario
- Restaurants/Food & Dining, Ontario
- Retail Book Stores, Ontario
- Roofing Consultants, Ontario - Roofing Companies
- Roofing Contractors, Ontario - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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