- Radio Communications Equipment & Systems , Petawawa
- Ready Mix Concrete, Petawawa - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Petawawa
- Real Estate, Petawawa - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Petawawa
- Real Estate Agent - Property Lessors, Petawawa
- Real Estate Appraiser, Petawawa - Appraisal Services
- Real Estate Appraisers & Consulting Services, Petawawa
- Real Estate Broker, Petawawa
- Real Estate Services, Petawawa
- Reducing Exercise & Weight Control Services, Petawawa
- Religious Organizations, Petawawa
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- Repair Services, Petawawa
- Residential, Petawawa
- Residential Apartments, Petawawa
- Residential Construction Contractors, Petawawa - General Contractors
- Residential Real Estate Companies, Petawawa
- Restaurant & Food Service Management Services, Petawawa
- Restaurants/Food & Dining, Petawawa
- Riding & Rodeo Services, Petawawa
- Road Construction, Petawawa - Companies & Contractors
- Roofing Consultants, Petawawa - Roofing Companies
- Roofing Contractors, Petawawa - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Petawawa
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