- Radio & Television Repair Shops , Elmsford - TV Repair
- Radio Communications Equipment & Systems , Elmsford
- Radiotelephone Communications, Elmsford
- Radon Testing & Services, Elmsford
- Railroad, Elmsford - Commuter & Passenger Transport
- Range & Oven Repair, Service & Sales, Elmsford
- Ready Mix Concrete, Elmsford - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Elmsford
- Real Estate, Elmsford - Agent, Broker & Companies
- Real Estate Developers, Elmsford
- Real Estate Management, Elmsford
- Real Estate Services, Elmsford
- Record Storage, Destruction & Management, Elmsford
- Records, Tapes, CDs - Used & Vintage, Elmsford
- Recycling Drop-Off Centers, Elmsford
- Recycling Scrap & Waste Materials, Elmsford - Scrap Metal, etc
- Refrigeration & Air Conditioning Contractors, Elmsford - Installation, Repair, Sales & Service
- Refrigeration & Cooling Equipment, Parts & Supplies , Elmsford - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Elmsford - Ac, Freezer, Refrigerator Repair
- Refrigerator & Freezer Equipment, Parts & Supplies, Elmsford
- Rehabilitation Centers, Products & Services, Elmsford
- Rehabilitation Specialists, Elmsford
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- Religious Apparel & Vestments, Elmsford
- Religious Education, Elmsford
- Religious Goods & Church Supplies Stores, Elmsford
- Religious Organizations, Elmsford
- Rental & Leasing Business Equipment, Elmsford
- Repair Services, Elmsford
- Research & Development Bureaus, Elmsford - Commercial, Economic, Sociological & Educational Research
- Research Services, Elmsford
- Resident Camps, Elmsford
- Residential, Elmsford
- Residential Apartments, Elmsford
- Residential Electricians, Elmsford - Electric Contractors
- Restaurant & Lounge, Bar, Or Pub, Elmsford
- Restaurant Equipment, Elmsford
- Restaurant Equipment & Supplies, Elmsford
- Restaurant Equipment Repair & Service, Elmsford - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurant Supplies & Equipment, Elmsford
- Restaurants/Food & Dining, Elmsford
- Roofing Consultants, Elmsford - Roofing Companies
- Roofing Contractors, Elmsford - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rubber & Plastic Products, Elmsford
- Rubber Products - Manufacturers, Elmsford
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