- Racing Car Supplies, Columbus
- Racing Including Track Operations, Columbus
- Radiator Coolant & Solvents, Columbus - Engine Coolant
- Radiator Repair, Columbus - Gas Tank Repair
- Radiator Repair & Rebuild, Columbus
- Radio & Television Repair Shops , Columbus - TV Repair
- Radio Communications Equipment & Systems , Columbus
- Radio Stations & Broadcast Companies, Columbus - Radio, Television & Publishers Representatives
- Radio Stations & Broadcasting Companies, Columbus
- Railroad Companies, Columbus
- Rainwear Retail, Columbus
- Rape Victim Services, Columbus
- Reading Instruction Schools, Columbus
- Ready Mix Concrete, Columbus - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Columbus
- Real Estate, Columbus - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Columbus
- Real Estate Appraiser, Columbus - Appraisal Services
- Real Estate Appraisers & Consulting Services, Columbus
- Real Estate Consultants, Columbus
- Real Estate Developers, Columbus
- Real Estate Inspectors, Columbus - Real Estate Inspection Service
- Real Estate Management, Columbus
- Real Estate Rentals, Columbus
- Real Estate Services, Columbus
- Record Storage, Destruction & Management, Columbus
- Records, Tapes, CDs - Used & Vintage, Columbus
- Recycling Drop-Off Centers, Columbus
- Recycling Scrap & Waste Materials, Columbus - Scrap Metal, etc
- Red Wing Shoes, Columbus
- Reducing Exercise & Weight Control Services, Columbus
- Refrigeration & Cooling Equipment, Parts & Supplies , Columbus - Water Cooler, Ice Machine, Beverage Dispenser, etc
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- Refrigerator & Freezer Equipment, Parts & Supplies, Columbus
- Rehabilitation Centers, Columbus
- Rehabilitation Centers, Products & Services, Columbus
- Rehabilitation Specialists, Columbus
- Rehabilitational Job Training Services, Columbus
- Relief Organizations, Columbus
- Religious Goods & Church Supplies Stores, Columbus
- Religious Organizations, Columbus
- Religious Services, Columbus
- Rendering Companies, Columbus
- Repair Services, Columbus
- Research & Development Bureaus, Columbus - Commercial, Economic, Sociological & Educational Research
- Research Services, Columbus
- Residential, Columbus
- Residential Apartments, Columbus
- Residential Care Facilities, Columbus
- Residential Construction Contractors, Columbus - General Contractors
- Restaurant & Lounge, Bar, Or Pub, Columbus
- Restaurant Equipment, Columbus
- Restaurant Equipment & Supplies, Columbus
- Restaurant Lobster, Columbus
- Restaurant Management & Consulting, Columbus - Food Facilities Consultants
- Restaurant Supplies & Equipment, Columbus
- Restaurants - Breakfast Brunch Lunch, Columbus
- Restaurants/Food & Dining, Columbus
- Retail Book Stores, Columbus
- Retirement Communities & Home, Assisted Living & Apartments, Columbus
- Roller Skating Rinks, Columbus
- Roofing Consultants, Columbus - Roofing Companies
- Roofing Contractors, Columbus - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rv Parks, Columbus
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