- Racing Car Supplies, Columbia
- Racing Including Track Operations, Columbia
- Radiator Coolant & Solvents, Columbia - Engine Coolant
- Radio & Television Repair Shops , Columbia - TV Repair
- Radio Stations & Broadcasting Companies, Columbia
- Railroad Companies, Columbia
- Ready Mix Concrete, Columbia - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Columbia
- Real Estate, Columbia - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Columbia
- Real Estate Appraiser, Columbia - Appraisal Services
- Real Estate Appraisers & Consulting Services, Columbia
- Real Estate Developers, Columbia
- Real Estate Management, Columbia
- Real Estate Services, Columbia
- Recording Studio - Equipment & Rental, Columbia
- Recording Studio Service - Sound & Video, Columbia
- Recreational Equipment & Supplies Companies, Columbia
- Recreational Good Manufacturers, Columbia
- Recreational Organizations, Columbia
- Recycling Scrap & Waste Materials, Columbia - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Columbia
- Refrigeration & Cooling Equipment, Parts & Supplies , Columbia - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Rehabilitation Centers, Products & Services, Columbia
- Rehabilitation Specialists, Columbia
- Rehabilitational Job Training Services, Columbia
- Religious Education, Columbia
- Religious Goods & Church Supplies Stores, Columbia
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- Religious Organizations, Columbia
- Religious Practitioners, Columbia
- Religious Services, Columbia
- Rental & Leasing Business Equipment, Columbia
- Repair Services, Columbia
- Residential, Columbia
- Residential Apartments, Columbia
- Residential Architect, Columbia
- Residential Care Facilities, Columbia
- Residential Construction Contractors, Columbia - General Contractors
- Residential Real Estate - Rental & Leasing, Columbia
- Resource Centers, Columbia
- Restaurant & Lounge, Bar, Or Pub, Columbia
- Restaurant Equipment, Columbia
- Restaurant Equipment & Supplies, Columbia
- Restaurant Supplies & Equipment, Columbia
- Restaurants - Breakfast Brunch Lunch, Columbia
- Restaurants/Food & Dining, Columbia
- Retirement Communities & Home, Assisted Living & Apartments, Columbia
- Roadside Assistance, Road Service & Towing Service, Columbia
- Roller Skating Rinks, Columbia
- Roofing Consultants, Columbia - Roofing Companies
- Roofing Contractors, Columbia - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Columbia
- Rooming & Boarding Houses, Columbia
- Rubber Products - Retail, Columbia
- Rv Parks, Columbia
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