- Racing Car Supplies, Berkeley Lake
- Radio Communications Equipment & Systems , Berkeley Lake
- Radio Stations & Broadcasting Companies, Berkeley Lake
- Real Estate, Berkeley Lake - Agent, Broker & Companies
- Real Estate Appraiser, Berkeley Lake - Appraisal Services
- Real Estate Appraisers & Consulting Services, Berkeley Lake
- Real Estate Attorneys & Lawyers, Berkeley Lake
- Real Estate Developers, Berkeley Lake
- Real Estate Lawyers & Attorneys, Berkeley Lake
- Real Estate Services, Berkeley Lake
- Recording Instruments Industrial & Scientific, Berkeley Lake
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- Recording Studio - Equipment & Rental, Berkeley Lake
- Religious Organizations, Berkeley Lake
- Repair Services, Berkeley Lake
- Research & Development Labs, Berkeley Lake - Laboratories
- Research Services, Berkeley Lake
- Restaurants/Food & Dining, Berkeley Lake
- Road Construction, Berkeley Lake - Companies & Contractors
- Road Construction & Repair Contractors, Berkeley Lake
- Roofing Consultants, Berkeley Lake - Roofing Companies
- Roofing Contractors, Berkeley Lake - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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