- Radiator Coolant & Solvents, Brooklyn - Engine Coolant
- Radio & Television Repair Shops , Brooklyn - TV Repair
- Radio Communications Equipment & Systems , Brooklyn
- Ready Mix Concrete, Brooklyn - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Brooklyn
- Real Estate, Brooklyn - Agent, Broker & Companies
- Real Estate Management, Brooklyn
- Real Estate Services, Brooklyn
- Recording Studio - Equipment & Rental, Brooklyn
- Recording Studio Equipment, Brooklyn
- Records, Tapes, CDs - Used & Vintage, Brooklyn
- Recreational Equipment Repair & Service, Brooklyn
- Recycling Scrap & Waste Materials, Brooklyn - Scrap Metal, etc
- Rehabilitation Centers, Brooklyn
- Rehabilitation Centers, Products & Services, Brooklyn
- Rehabilitation Products, Brooklyn
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- Rehabilitation Specialists, Brooklyn
- Religious Organizations, Brooklyn
- Rental & Leasing Business Equipment, Brooklyn
- Rental Property Management, Brooklyn
- Repair Services, Brooklyn
- Research & Development Bureaus, Brooklyn - Commercial, Economic, Sociological & Educational Research
- Research Services, Brooklyn
- Residential, Brooklyn
- Residential Apartments, Brooklyn
- Residential Care Facilities, Brooklyn
- Residential Construction Contractors, Brooklyn - General Contractors
- Restaurants/Food & Dining, Brooklyn
- Roofing Consultants, Brooklyn - Roofing Companies
- Roofing Contractors, Brooklyn - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Brooklyn
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