- Race Car Dealers, Amityville
- Racing Car Supplies, Amityville
- Racing Including Track Operations, Amityville
- Radiologists, Amityville - Radiology Doctors, Physicians & Surgeons
- Real Estate, Amityville - Agent, Broker & Companies
- Real Estate Appraiser, Amityville - Appraisal Services
- Real Estate Appraisers & Consulting Services, Amityville
- Real Estate Management, Amityville
- Real Estate Services, Amityville
- Real Estate Tax Searchers, Amityville
- Records, Tapes, CDs - Used & Vintage, Amityville
- Recreational Equipment Repair & Service, Amityville
- Recycling Drop-Off Centers, Amityville
- Recycling Scrap & Waste Materials, Amityville - Scrap Metal, etc
- Refrigerated Truck, Amityville
- Refuse Collection & Disposal, Amityville
- Refuse Systems & Garbage Disposal, Amityville
- Religious Charitable & Non-Profit Organizations, Amityville
- Religious Counseling, Amityville
- Religious Education, Amityville
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- Religious Goods & Church Supplies Stores, Amityville
- Religious Organizations, Amityville
- Religious Services, Amityville
- Repair Services, Amityville
- Research Services, Amityville
- Residential, Amityville
- Residential Apartments, Amityville
- Residential Care Facilities, Amityville
- Residential Construction Contractors, Amityville - General Contractors
- Restaurant Equipment, Amityville
- Restaurant Equipment & Supplies, Amityville
- Restaurant Equipment Repair & Service, Amityville - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurant Supplies & Equipment, Amityville
- Restaurants - Breakfast Brunch Lunch, Amityville
- Restaurants/Food & Dining, Amityville
- Retirement Communities & Home, Assisted Living & Apartments, Amityville
- Rigging Service & Crane Hoisting, Amityville
- Roofing Consultants, Amityville - Roofing Companies
- Roofing Contractors, Amityville - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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