- Race Track Equipment & Supplies, Dayton
- Racing Car Supplies, Dayton
- Racing Engines, Dayton
- Radiator Coolant & Solvents, Dayton - Engine Coolant
- Radiator Repair, Dayton - Gas Tank Repair
- Radio & Television Repair Shops , Dayton - TV Repair
- Radio Communications Equipment & Systems , Dayton
- Radio Equipment & Parts Stores & Dealers, Dayton
- Radio Stations & Broadcast Companies, Dayton - Radio, Television & Publishers Representatives
- Radio Stations & Broadcasting Companies, Dayton
- Radiologists, Dayton - Radiology Doctors, Physicians & Surgeons
- Radiology Equipment & Services, Dayton - X-Ray Equipment & Supplies
- Radiotelephone Communications, Dayton
- Radon Testing & Services, Dayton
- Railroad & Subway Construction Contractors, Dayton
- Railroad Contractors, Dayton
- Range & Oven Repair, Service & Sales, Dayton
- Ready Mix Concrete, Dayton - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Dayton
- Real Estate, Dayton - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Dayton
- Real Estate Agent - Property Lessors, Dayton
- Real Estate Appraiser, Dayton - Appraisal Services
- Real Estate Appraisers & Consulting Services, Dayton
- Real Estate Attorneys & Lawyers, Dayton
- Real Estate Broker, Dayton
- Real Estate Consultants, Dayton
- Real Estate Developers, Dayton
- Real Estate Inspectors, Dayton - Real Estate Inspection Service
- Real Estate Lawyers & Attorneys, Dayton
- Real Estate Management, Dayton
- Real Estate Properties, Dayton
- Real Estate Property Investment Properties, Dayton
- Real Estate Rentals, Dayton
- Real Estate Services, Dayton
- Record Storage, Destruction & Management, Dayton
- Recording Studio Equipment, Dayton
- Recording Studio Service - Sound & Video, Dayton
- Records, Tapes, CDs - Used & Vintage, Dayton
- Recreational Equipment & Supplies Companies, Dayton
- Recreational Equipment Repair & Service, Dayton
- Recreational Good Manufacturers, Dayton
- Recreational Services, Dayton
- Recycling & Sanitation Consultants, Dayton
- Recycling Drop-Off Centers, Dayton
- Recycling Scrap & Waste Materials, Dayton - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Dayton
- Reflexologists, Dayton
- Reformed Churches, Dayton
- Refractory Systems & Materials, Dayton
- Refrigerated Beverage Dispenser, Dayton - Water Coolers Equipment & Supplies
- Refrigerated Storage & Warehouse, Dayton - Warehousing
- Refrigerated Truck, Dayton
- Refrigeration & Cooling Equipment, Parts & Supplies , Dayton - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Dayton - Ac, Freezer, Refrigerator Repair
- Refrigerator & Freezer Equipment, Parts & Supplies, Dayton
- Refrigerator Sales, Service & Repair, Dayton - Fridge
- Rehabilitation Centers, Dayton
- Rehabilitation Centers, Products & Services, Dayton
- Rehabilitation Specialists, Dayton
- Rehabilitational Job Training Services, Dayton
- Relief Organizations, Dayton
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- Religious Education, Dayton
- Religious Goods & Church Supplies Stores, Dayton
- Religious Organizations, Dayton
- Religious Practitioners, Dayton
- Religious Science Churches, Dayton
- Religious Services, Dayton
- Rental & Leasing Business Equipment, Dayton
- Repair Services, Dayton
- Repossession Services, Dayton
- Research & Development Bureaus, Dayton - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Dayton - Laboratories
- Research Clinics, Dayton
- Research Services, Dayton
- Residential, Dayton
- Residential Apartments, Dayton
- Residential Architect, Dayton
- Residential Care Facilities, Dayton
- Residential Construction Contractors, Dayton - General Contractors
- Residential Landfills, Dayton
- Residential Real Estate - Rental & Leasing, Dayton
- Resorts & Hotels, Dayton
- Resource Centers, Dayton
- Restaurant & Food Service Management Services, Dayton
- Restaurant & Lounge, Bar, Or Pub, Dayton
- Restaurant Equipment, Dayton
- Restaurant Equipment & Supplies, Dayton
- Restaurant Equipment Repair & Service, Dayton - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurant Management & Consulting, Dayton - Food Facilities Consultants
- Restaurant Supplies & Equipment, Dayton
- Restaurants - Breakfast Brunch Lunch, Dayton
- Restaurants/Food & Dining, Dayton
- Restoration Contractors, Dayton
- Resume Service, Dayton
- Retail Book Stores, Dayton
- Retaining Wall Contractors, Dayton - Build & Repair - Blocks, Concrete, Stones, etc
- Retirement Communities & Home, Assisted Living & Apartments, Dayton
- Retirement Home Referral Service, Dayton - Nursing Home & Care Facilities Referrals & Information
- Retirement Homes, Dayton
- Rhema Church, Dayton
- Rheumatologists, Dayton - Rheumatology Doctors, Physicians & Surgeons
- Riding & Rodeo Services, Dayton
- Rifle & Pistol Ranges, Dayton
- Rigging Service & Crane Hoisting, Dayton
- Road Construction, Dayton - Companies & Contractors
- Road Construction & Repair Contractors, Dayton
- Roadside Assistance, Road Service & Towing Service, Dayton
- Robots & Robotics System, Dayton
- Rock Shops, Dayton
- Rods, Springs & Suspension Equipment & Supplies, Dayton
- Roller Skating Rinks, Dayton
- Roof Repair, Dayton - Roofing Repair Services
- Roofing & Siding Materials, Equipments & Supplies, Dayton - Wholesale, Manufacturers & Suppliers
- Roofing Consultants, Dayton - Roofing Companies
- Roofing Contractors, Dayton - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Dayton
- Rooming & Boarding Houses, Dayton
- Royalties Oil & Mineral, Dayton
- Rubber Products - Retail, Dayton
- RV & Campers Repair & Service, Dayton
- Rv Parks, Dayton
- RV Repair, Dayton - Recreational Vehicle
- Ryder Truck Rental , Dayton - Ryder Moving
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