- Racing Car Supplies, Durham
- Radiator Coolant & Solvents, Durham - Engine Coolant
- Radio & Television Repair Shops , Durham - TV Repair
- Radio Broadcasting Program Producers, Durham
- Radio Stations & Broadcast Companies, Durham - Radio, Television & Publishers Representatives
- Radio Stations & Broadcasting Companies, Durham
- Radiologists, Durham - Radiology Doctors, Physicians & Surgeons
- Radiotelephone Communications, Durham
- Railroad Companies, Durham
- Reading Instruction Schools, Durham
- Ready Mix Concrete, Durham - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Durham
- Real Estate, Durham - Agent, Broker & Companies
- Real Estate & Insurance Schools, Durham
- Real Estate Agent & Broker Services, Durham
- Real Estate Agent - Property Lessors, Durham
- Real Estate Appraiser, Durham - Appraisal Services
- Real Estate Appraisers & Consulting Services, Durham
- Real Estate Attorneys & Lawyers, Durham
- Real Estate Attorneys & Lawyers, Durham
- Real Estate Broker, Durham
- Real Estate Consultants, Durham
- Real Estate Developers, Durham
- Real Estate Inspectors, Durham - Real Estate Inspection Service
- Real Estate Lawyers & Attorneys, Durham
- Real Estate Management, Durham
- Real Estate Properties, Durham
- Real Estate Property Investment Properties, Durham
- Real Estate Rentals, Durham
- Real Estate Services, Durham
- Record Destruction Service, Durham
- Record Labels, Durham - Record Companies
- Record Storage, Destruction & Management, Durham
- Recording Studio - Equipment & Rental, Durham
- Records, Tapes, CDs - Used & Vintage, Durham
- Recreation Management Services, Durham
- Recreational Equipment & Supplies Companies, Durham
- Recreational Organizations, Durham
- Recreational Services, Durham
- Recreational Vehicles & Campers Rent & Lease, Durham
- Recycling Drop-Off Centers, Durham
- Recycling Scrap & Waste Materials, Durham - Scrap Metal, etc
- Red Wing Shoes, Durham
- Reducing Exercise & Weight Control Services, Durham
- Reform Synagogues, Durham
- Refrigeration & Cooling Equipment, Parts & Supplies , Durham - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Durham - Ac, Freezer, Refrigerator Repair
- Refrigerator & Freezer Equipment, Parts & Supplies, Durham
- Refugee Programs, Resettlement & Health Services, Durham
- Refuse Collection & Disposal Services, Durham
- Rehabilitation Centers, Products & Services, Durham
- Rehabilitation Specialists, Durham
- Rehabilitational Job Training Services, Durham
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- Relief Organizations, Durham
- Religious Education, Durham
- Religious Goods & Church Supplies Stores, Durham
- Religious Organizations, Durham
- Religious Practitioners, Durham
- Rental & Leasing Business Equipment, Durham
- Repair Services, Durham
- Research & Development Bureaus, Durham - Commercial, Economic, Sociological & Educational Research
- Research & Development Engineers, Durham
- Research & Development Labs, Durham - Laboratories
- Research Clinics, Durham
- Research Service Libraries, Durham
- Research Services, Durham
- Residential, Durham
- Residential Apartments, Durham
- Residential Architectural Designers, Durham
- Residential Care Facilities, Durham
- Residential Construction Contractors, Durham - General Contractors
- Residential Electricians, Durham - Electric Contractors
- Residential Landfills, Durham
- Residential Real Estate Companies, Durham
- Resorts & Hotels, Durham
- Resource Centers, Durham
- Restaurant & Lounge, Bar, Or Pub, Durham
- Restaurant Equipment, Durham
- Restaurant Equipment & Supplies, Durham
- Restaurant Equipment Cleaning, Durham - Restaurant Cleaners
- Restaurant Equipment Repair & Service, Durham - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurant Supplies & Equipment, Durham
- Restaurants - Breakfast Brunch Lunch, Durham
- Restaurants/Food & Dining, Durham
- Restoration Church, Durham
- Resume Service, Durham
- Retail Book Stores, Durham
- Retirement Communities & Home, Assisted Living & Apartments, Durham
- Retirement Homes, Durham
- Retreat Facilities & Houses, Durham
- Rheem / Rudd Heating & Air Conditioning Contractors, Durham - Air Conditioner Contractors & Systems
- Rheumatologists, Durham - Rheumatology Doctors, Physicians & Surgeons
- Riding & Rodeo Services, Durham
- Rigging Service & Crane Hoisting, Durham
- Road Construction, Durham - Companies & Contractors
- Rodeo & Equestrian Equipment & Supplies, Durham
- Roller Skating Rinks, Durham
- Roof Cleaning & Maintenance, Durham - Roofing Services
- Roofing & Siding Materials, Equipments & Supplies, Durham - Wholesale, Manufacturers & Suppliers
- Roofing Consultants, Durham - Roofing Companies
- Roofing Contractors, Durham - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Durham
- Rooming & Boarding Houses, Durham
- Rv Parks, Durham
- Rvs Sales, Rental & Leasing, Durham
- Ryder Truck Rental , Durham - Ryder Moving
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