- Radio & Tv Communications Equipment Manufacturers, Portola
- Real Estate, Portola - Agent, Broker & Companies
- Real Estate Appraisers & Consulting Services, Portola
- Real Estate Consultants, Portola
- Real Estate Developers, Portola
- Real Estate Services, Portola
- Recycling Drop-Off Centers, Portola
- Refuse Collection & Disposal, Portola
- Refuse Systems & Garbage Disposal, Portola
- Religious Organizations, Portola
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- Relocation Services, Portola
- Repair Services, Portola
- Residential, Portola
- Residential Apartments, Portola
- Residential Care Facilities, Portola
- Resorts & Hotels, Portola
- Restaurants/Food & Dining, Portola
- Roadside Assistance, Road Service & Towing Service, Portola
- Rv Parks, Portola
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