- Racing Car Supplies, Mississauga
- Racing Including Track Operations, Mississauga
- Radiator Coolant & Solvents, Mississauga - Engine Coolant
- Radiator Repair, Mississauga - Gas Tank Repair
- Radio & Television Repair Shops , Mississauga - TV Repair
- Radio Communications Equipment & Systems , Mississauga
- Radio Stations & Broadcasting Companies, Mississauga
- Radiology Equipment & Services, Mississauga - X-Ray Equipment & Supplies
- Radiotelephone Communications, Mississauga
- Railroad, Mississauga - Commuter & Passenger Transport
- Railroad Companies, Mississauga
- Railroad Services, Mississauga
- Rape Victim Services, Mississauga
- Ready Mix Concrete, Mississauga - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Mississauga
- Real Estate, Mississauga - Agent, Broker & Companies
- Real Estate Agencies, Mississauga
- Real Estate Agent & Broker Services, Mississauga
- Real Estate Agent - Property Lessors, Mississauga
- Real Estate Appraiser, Mississauga - Appraisal Services
- Real Estate Appraisers & Consulting Services, Mississauga
- Real Estate Attorneys & Lawyers, Mississauga
- Real Estate Attorneys & Lawyers, Mississauga
- Real Estate Broker, Mississauga
- Real Estate Consultants, Mississauga
- Real Estate Developers, Mississauga
- Real Estate Lawyers & Attorneys, Mississauga
- Real Estate Management, Mississauga
- Real Estate Properties, Mississauga
- Real Estate Property Investment Properties, Mississauga
- Real Estate Rentals, Mississauga
- Real Estate Services, Mississauga
- Real Estate Staging Service, Mississauga
- Record Storage, Destruction & Management, Mississauga
- Recording Studio - Equipment & Rental, Mississauga
- Records, Tapes, Cd & Dvd Manufacturers, Mississauga
- Records, Tapes, CDs - Used & Vintage, Mississauga
- Records, Tapes, Compact Discs Wholesale, Mississauga
- Recreational Equipment & Supplies Companies, Mississauga
- Recreational Equipment Repair & Service, Mississauga
- Recreational Good Manufacturers, Mississauga
- Recreational Organizations, Mississauga
- Recreational Services, Mississauga
- Recycling Drop-Off Centers, Mississauga
- Recycling Scrap & Waste Materials, Mississauga - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Mississauga
- Reflexologists, Mississauga
- Reformed Churches, Mississauga
- Refrigerated Storage & Warehouse, Mississauga - Warehousing
- Refrigerated Truck, Mississauga
- Refrigeration & Air Conditioning Contractors, Mississauga - Installation, Repair, Sales & Service
- Refrigeration & Cooling Equipment, Parts & Supplies , Mississauga - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Mississauga - Ac, Freezer, Refrigerator Repair
- Refrigerator Sales, Service & Repair, Mississauga - Fridge
- Refuse Collection & Disposal Services, Mississauga
- Refuse Systems & Garbage Disposal, Mississauga
- Registered Education Savings Plan, Mississauga
- Rehabilitation Centers, Products & Services, Mississauga
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- Rehabilitation Specialists, Mississauga
- Rehabilitational Job Training Services, Mississauga
- Religious Education, Mississauga
- Religious Goods & Church Supplies Stores, Mississauga
- Religious Organizations, Mississauga
- Relocation Services, Mississauga
- Rental & Leasing Business Equipment, Mississauga
- Repair Services, Mississauga
- Reprographic Services, Mississauga
- Research & Development Bureaus, Mississauga - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Mississauga - Laboratories
- Research Services, Mississauga
- Residential, Mississauga
- Residential Apartments, Mississauga
- Residential Architect, Mississauga
- Residential Care Facilities, Mississauga
- Residential Construction Contractors, Mississauga - General Contractors
- Residential Electricians, Mississauga - Electric Contractors
- Residential Lighting Fixtures Manufacturers, Mississauga
- Residential Real Estate - Rental & Leasing, Mississauga
- Residential Real Estate Companies, Mississauga
- Resource Consultants, Mississauga
- Restaurant & Food Service Management Services, Mississauga
- Restaurant & Lounge, Bar, Or Pub, Mississauga
- Restaurant Equipment, Mississauga
- Restaurant Equipment & Supplies, Mississauga
- Restaurant Equipment Repair & Service, Mississauga - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurant Lobster, Mississauga
- Restaurant Management & Consulting, Mississauga - Food Facilities Consultants
- Restaurant Supplies & Equipment, Mississauga
- Restaurants - Breakfast Brunch Lunch, Mississauga
- Restaurants/Food & Dining, Mississauga
- Restoration Contractors, Mississauga
- Resume Service, Mississauga
- Retail Book Stores, Mississauga
- Retirement & Estate Planning, Mississauga
- Retirement Communities & Home, Assisted Living & Apartments, Mississauga
- Retirement Planning Consultants & Services, Mississauga
- Retreat Facilities & Houses, Mississauga
- Rice Products, Mississauga
- Ricoh Copy Machines, Mississauga
- Ride Share Information, Mississauga
- Riding & Rodeo Services, Mississauga
- Riding Apparel & Equipment, Mississauga
- Road Construction, Mississauga - Companies & Contractors
- Road Construction & Repair Contractors, Mississauga
- Road Construction Equipment & Machinery, Mississauga
- Robots & Robotics System, Mississauga
- Rodeo & Equestrian Equipment & Supplies, Mississauga
- Rods, Springs & Suspension Equipment & Supplies, Mississauga
- Roofing Consultants, Mississauga - Roofing Companies
- Roofing Contractors, Mississauga - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Mississauga
- Rubber Products - Retail, Mississauga
- Rubber Products Industrial Equipment & Supplies, Mississauga
- Rust Preventives, Mississauga
- Ryder Truck Rental , Mississauga - Ryder Moving
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