- Radio & Tv Communications Equipment Manufacturers, West Islip
- Radio Communications Equipment & Systems , West Islip
- Radiologists, West Islip - Radiology Doctors, Physicians & Surgeons
- Real Estate, West Islip - Agent, Broker & Companies
- Real Estate Agent & Broker Services, West Islip
- Real Estate Agent - Property Lessors, West Islip
- Real Estate Appraiser, West Islip - Appraisal Services
- Real Estate Appraisers & Consulting Services, West Islip
- Real Estate Broker, West Islip
- Real Estate Consultants, West Islip
- Real Estate Management, West Islip
- Real Estate Services, West Islip
- Refrigeration & Cooling Equipment, Parts & Supplies , West Islip - Water Cooler, Ice Machine, Beverage Dispenser, etc
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- Refrigeration Repair & Service, West Islip - Ac, Freezer, Refrigerator Repair
- Religious Education, West Islip
- Religious Organizations, West Islip
- Repair Services, West Islip
- Reptiles, West Islip
- Residential, West Islip
- Residential Apartments, West Islip
- Residential Architect, West Islip
- Residential Construction Contractors, West Islip - General Contractors
- Residential Electricians, West Islip - Electric Contractors
- Restaurants/Food & Dining, West Islip
- Roadside Assistance, Road Service & Towing Service, West Islip
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