- Racing Including Track Operations, Brewster
- Radiologists, Brewster - Radiology Doctors, Physicians & Surgeons
- Ready Mix Concrete, Brewster - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Brewster
- Real Estate, Brewster - Agent, Broker & Companies
- Real Estate Agencies, Brewster
- Real Estate Agent - Property Lessors, Brewster
- Real Estate Appraiser, Brewster - Appraisal Services
- Real Estate Appraisers & Consulting Services, Brewster
- Real Estate Developers, Brewster
- Real Estate Management, Brewster
- Real Estate Services, Brewster
- Recording Studio Service - Sound & Video, Brewster
- Reform Synagogues, Brewster
- Refrigeration & Cooling Equipment, Parts & Supplies , Brewster - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Brewster - Ac, Freezer, Refrigerator Repair
- Refuse Collection & Disposal, Brewster
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- Refuse Systems & Garbage Disposal, Brewster
- Religious Organizations, Brewster
- Repair Services, Brewster
- Reptiles, Brewster
- Research Services, Brewster
- Residential, Brewster
- Residential Care Facilities, Brewster
- Residential Construction Contractors, Brewster - General Contractors
- Resource Centers, Brewster
- Restaurants/Food & Dining, Brewster
- Retirement Communities & Home, Assisted Living & Apartments, Brewster
- Riding & Rodeo Services, Brewster
- Road Construction, Brewster - Companies & Contractors
- Road Construction & Repair Contractors, Brewster
- Roofing Consultants, Brewster - Roofing Companies
- Roofing Contractors, Brewster - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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