- Racing Including Track Operations, Columbus
- Radio & Television Repair Shops , Columbus - TV Repair
- Radio Communications Equipment & Systems , Columbus
- Radio Stations & Broadcasting Companies, Columbus
- Radiologists, Columbus - Radiology Doctors, Physicians & Surgeons
- Radiotelephone Communications, Columbus
- Railroad & Subway Construction Contractors, Columbus
- Railroad Companies, Columbus
- Railroad Contractors, Columbus
- Railroad Services, Columbus
- Rape Victim Services, Columbus
- Ready Mix Concrete, Columbus - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Columbus
- Real Estate, Columbus - Agent, Broker & Companies
- Real Estate Agencies, Columbus
- Real Estate Agent - Property Lessors, Columbus
- Real Estate Appraiser, Columbus - Appraisal Services
- Real Estate Appraisers & Consulting Services, Columbus
- Real Estate Attorneys & Lawyers, Columbus
- Real Estate Consultants, Columbus
- Real Estate Developers, Columbus
- Real Estate Lawyers & Attorneys, Columbus
- Real Estate Management, Columbus
- Real Estate Rentals, Columbus
- Real Estate Services, Columbus
- Records, Tapes, CDs - Used & Vintage, Columbus
- Recreational Equipment & Supplies Companies, Columbus
- Recycling & Sanitation Consultants, Columbus
- Recycling Drop-Off Centers, Columbus
- Recycling Scrap & Waste Materials, Columbus - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Columbus
- Refrigerated Beverage Dispenser, Columbus - Water Coolers Equipment & Supplies
- Refrigeration & Cooling Equipment, Parts & Supplies , Columbus - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Columbus - Ac, Freezer, Refrigerator Repair
- Refrigerator & Freezer Equipment, Parts & Supplies, Columbus
- Refrigerator Sales, Service & Repair, Columbus - Fridge
- Rehabilitation Centers, Products & Services, Columbus
- Rehabilitation Specialists, Columbus
- Rehabilitational Job Training Services, Columbus
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- Relief Organizations, Columbus
- Religious Education, Columbus
- Religious Organizations, Columbus
- Religious Practitioners, Columbus
- Rental & Leasing Business Equipment, Columbus
- Repair Services, Columbus
- Research & Development Bureaus, Columbus - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Columbus - Laboratories
- Research Services, Columbus
- Residential, Columbus
- Residential Apartments, Columbus
- Residential Care Facilities, Columbus
- Residential Construction Contractors, Columbus - General Contractors
- Residential Electricians, Columbus - Electric Contractors
- Restaurant & Food Service Management Services, Columbus
- Restaurant Equipment, Columbus
- Restaurant Equipment & Supplies, Columbus
- Restaurant Equipment Cleaning, Columbus - Restaurant Cleaners
- Restaurant Equipment Repair & Service, Columbus - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurant Supplies & Equipment, Columbus
- Restaurants - Breakfast Brunch Lunch, Columbus
- Restaurants/Food & Dining, Columbus
- Retail Book Stores, Columbus
- Retirement Communities & Home, Assisted Living & Apartments, Columbus
- Rheem / Rudd Heating & Air Conditioning Contractors, Columbus - Air Conditioner Contractors & Systems
- Riding & Rodeo Services, Columbus
- Rigging Equipment & Supplies, Columbus
- Road Construction, Columbus - Companies & Contractors
- Roadside Assistance, Road Service & Towing Service, Columbus
- Roller Skating Rinks, Columbus
- Roofing & Siding Materials, Equipments & Supplies, Columbus - Wholesale, Manufacturers & Suppliers
- Roofing Consultants, Columbus - Roofing Companies
- Roofing Contractors, Columbus - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Columbus
- Rotogravure & Photogravure Printing, Columbus
- Rubber Products - Retail, Columbus
- Rv Parks, Columbus
- RV Parts, Accessories & Equipment, Columbus - ATV & Recreation Vehicles
- RV Repair & Service, Columbus - ATV & Recreation Vehicles
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