- Radiator Coolant & Solvents, Sidney - Engine Coolant
- Radio & Television Repair Shops , Sidney - TV Repair
- Radio Communications Equipment & Systems , Sidney
- Radio Shack/Tandy Computers, Sidney
- Radio Stations & Broadcasting Companies, Sidney
- Radiologists, Sidney - Radiology Doctors, Physicians & Surgeons
- Ready Mix Concrete, Sidney - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Sidney
- Real Estate, Sidney - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Sidney
- Real Estate Loans & Contracts, Sidney
- Real Estate Services, Sidney
- Recreational Equipment & Supplies Companies, Sidney
- Recycling Drop-Off Centers, Sidney
- Recycling Scrap & Waste Materials, Sidney - Scrap Metal, etc
- Religious Organizations, Sidney
- Repair Services, Sidney
- Research & Development Bureaus, Sidney - Commercial, Economic, Sociological & Educational Research
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- Research Services, Sidney
- Residential, Sidney
- Residential Apartments, Sidney
- Residential Architect, Sidney
- Residential Care Facilities, Sidney
- Residential Construction Contractors, Sidney - General Contractors
- Residential Landfills, Sidney
- Restaurant & Lounge, Bar, Or Pub, Sidney
- Restaurants/Food & Dining, Sidney
- Retail Book Stores, Sidney
- Retirement Communities & Home, Assisted Living & Apartments, Sidney
- Rifle & Pistol Ranges, Sidney
- Rigging Service & Crane Hoisting, Sidney
- Roofing Consultants, Sidney - Roofing Companies
- Roofing Contractors, Sidney - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Sidney
- Rv Parks, Sidney
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