- Radio Broadcasting Program Producers, Oakland
- Radio Stations & Broadcasting Companies, Oakland
- Real Estate, Oakland - Agent, Broker & Companies
- Real Estate Appraiser, Oakland - Appraisal Services
- Real Estate Appraisers & Consulting Services, Oakland
- Real Estate Attorneys & Lawyers, Oakland
- Real Estate Lawyers & Attorneys, Oakland
- Real Estate Management, Oakland
- Real Estate Services, Oakland
- Record Destruction Service, Oakland
- Record Storage, Destruction & Management, Oakland
- Reducing Exercise & Weight Control Services, Oakland
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- Reformed Churches, Oakland
- Religious Organizations, Oakland
- Repair Services, Oakland
- Residential Care Facilities, Oakland
- Restaurant Equipment, Oakland
- Restaurant Equipment & Supplies, Oakland
- Restaurant Supplies & Equipment, Oakland
- Restaurants/Food & Dining, Oakland
- Retirement Communities & Home, Assisted Living & Apartments, Oakland
- Roofing Consultants, Oakland - Roofing Companies
- Roofing Contractors, Oakland - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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