- Racing Car Supplies, Finksburg
- Radio & Television Repair Shops , Finksburg - TV Repair
- Radio Communications Equipment & Systems , Finksburg
- Radio Equipment & Parts Stores & Dealers, Finksburg
- Radiotelephone Communications, Finksburg
- Radon Testing & Services, Finksburg
- Range & Oven Repair, Service & Sales, Finksburg
- Ready Mix Concrete, Finksburg - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Finksburg
- Real Estate, Finksburg - Agent, Broker & Companies
- Real Estate Appraisers & Consulting Services, Finksburg
- Real Estate Consultants, Finksburg
- Real Estate Services, Finksburg
- Recycling Drop-Off Centers, Finksburg
- Recycling Scrap & Waste Materials, Finksburg - Scrap Metal, etc
- Refrigeration & Air Conditioning Contractors, Finksburg - Installation, Repair, Sales & Service
- Refrigeration Repair & Service, Finksburg - Ac, Freezer, Refrigerator Repair
- Refuse Collection & Disposal Services, Finksburg
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- Refuse Systems & Garbage Disposal, Finksburg
- Religious Organizations, Finksburg
- Repair Services, Finksburg
- Research & Development Bureaus, Finksburg - Commercial, Economic, Sociological & Educational Research
- Research Services, Finksburg
- Residential, Finksburg
- Residential Construction Contractors, Finksburg - General Contractors
- Resource Centers, Finksburg
- Restaurant & Food Service Management Services, Finksburg
- Restaurants/Food & Dining, Finksburg
- Riding & Rodeo Services, Finksburg
- Road Construction, Finksburg - Companies & Contractors
- Road Construction & Repair Contractors, Finksburg
- Rodeo & Equestrian Equipment & Supplies, Finksburg
- Roofing Consultants, Finksburg - Roofing Companies
- Roofing Contractors, Finksburg - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rv Parks, Finksburg
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