- Radio & Television Repair Shops , Hewlett - TV Repair
- Radiologists, Hewlett - Radiology Doctors, Physicians & Surgeons
- Real Estate, Hewlett - Agent, Broker & Companies
- Real Estate Appraiser, Hewlett - Appraisal Services
- Real Estate Appraisers & Consulting Services, Hewlett
- Real Estate Consultants, Hewlett
- Real Estate Management, Hewlett
- Real Estate Services, Hewlett
- Recreational Services, Hewlett
- Religious Organizations, Hewlett
- Repair Services, Hewlett
- Research & Development Labs, Hewlett - Laboratories
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- Research Services, Hewlett
- Residential, Hewlett
- Residential Apartments, Hewlett
- Residential Construction Contractors, Hewlett - General Contractors
- Restaurants/Food & Dining, Hewlett
- Retail Book Stores, Hewlett
- Retirement & Estate Planning, Hewlett
- Retirement Communities & Home, Assisted Living & Apartments, Hewlett
- Retirement Planning Consultants & Services, Hewlett
- Rheumatologists, Hewlett - Rheumatology Doctors, Physicians & Surgeons
- Roofing Consultants, Hewlett - Roofing Companies
- Roofing Contractors, Hewlett - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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