- Races, Pittsburgh
- Racing Car Supplies, Pittsburgh
- Racquetball Courts, Pittsburgh
- Radiator Coolant & Solvents, Pittsburgh - Engine Coolant
- Radiator Repair, Pittsburgh - Gas Tank Repair
- Radio & Television Repair Shops , Pittsburgh - TV Repair
- Radio Broadcasting Program Producers, Pittsburgh
- Radio Communications Equipment & Systems , Pittsburgh
- Radio Equipment & Parts Stores & Dealers, Pittsburgh
- Radio Stations & Broadcast Companies, Pittsburgh - Radio, Television & Publishers Representatives
- Radio Stations & Broadcasting Companies, Pittsburgh
- Radioactivity Detection Devices, Pittsburgh
- Radiologists, Pittsburgh - Radiology Doctors, Physicians & Surgeons
- Radiology Equipment & Services, Pittsburgh - X-Ray Equipment & Supplies
- Radiotelephone Communications, Pittsburgh
- Radon Testing & Services, Pittsburgh
- Railroad, Pittsburgh - Commuter & Passenger Transport
- Railroad Car Repair & Maintenance, Pittsburgh
- Railroad Companies, Pittsburgh
- Railroad Repair & Maintenance, Pittsburgh
- Railroad Ties, Pittsburgh
- Rails & Accessories, Pittsburgh
- Range & Oven Repair, Service & Sales, Pittsburgh
- Rape Victim Services, Pittsburgh
- Reading Instruction Schools, Pittsburgh
- Ready Mix Concrete, Pittsburgh - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Pittsburgh
- Real Estate, Pittsburgh - Agent, Broker & Companies
- Real Estate & Insurance Schools, Pittsburgh
- Real Estate Agencies, Pittsburgh
- Real Estate Agent - Property Lessors, Pittsburgh
- Real Estate Apartments & Residential, Pittsburgh
- Real Estate Appraiser, Pittsburgh - Appraisal Services
- Real Estate Appraisers & Consulting Services, Pittsburgh
- Real Estate Attorneys & Lawyers, Pittsburgh
- Real Estate Attorneys & Lawyers, Pittsburgh
- Real Estate Consultants, Pittsburgh
- Real Estate Developers, Pittsburgh
- Real Estate Lawyers & Attorneys, Pittsburgh
- Real Estate Listings Services, Pittsburgh
- Real Estate Management, Pittsburgh
- Real Estate Properties, Pittsburgh
- Real Estate Property Investment Properties, Pittsburgh
- Real Estate Rentals, Pittsburgh
- Real Estate Services, Pittsburgh
- Real Estate Services Franchises, Pittsburgh
- Reconstructionist Synagogues, Pittsburgh
- Record Destruction Service, Pittsburgh
- Record Storage, Destruction & Management, Pittsburgh
- Recording Studio - Equipment & Rental, Pittsburgh
- Recording Studio Equipment, Pittsburgh
- Recording Studio Service - Sound & Video, Pittsburgh
- Records, Tapes, CDs - Used & Vintage, Pittsburgh
- Recreation Management Services, Pittsburgh
- Recreational Equipment & Supplies Companies, Pittsburgh
- Recreational Equipment Repair & Service, Pittsburgh
- Recreational Good Manufacturers, Pittsburgh
- Recreational Organizations, Pittsburgh
- Recreational Services, Pittsburgh
- Recreational Vehicles & Campers Rent & Lease, Pittsburgh
- Recycling Drop-Off Centers, Pittsburgh
- Recycling Scrap & Waste Materials, Pittsburgh - Scrap Metal, etc
- Red Wing Shoes, Pittsburgh
- Reducing Exercise & Weight Control Services, Pittsburgh
- Reflexologists, Pittsburgh
- Reform Synagogues, Pittsburgh
- Reformed Churches, Pittsburgh
- Refrigerated Beverage Dispenser, Pittsburgh - Water Coolers Equipment & Supplies
- Refrigerated Storage & Warehouse, Pittsburgh - Warehousing
- Refrigerated Truck, Pittsburgh
- Refrigeration & Air Conditioning Contractors, Pittsburgh - Installation, Repair, Sales & Service
- Refrigeration & Cooling Equipment, Parts & Supplies , Pittsburgh - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Pittsburgh - Ac, Freezer, Refrigerator Repair
- Refrigeration, Heating & Air Conditioning Schools, Pittsburgh
- Refrigerator & Freezer Equipment, Parts & Supplies, Pittsburgh
- Refrigerator Sales, Service & Repair, Pittsburgh - Fridge
- Refuse Collection & Disposal, Pittsburgh
- Refuse Collection & Disposal Services, Pittsburgh
- Refuse Systems & Garbage Disposal, Pittsburgh
- Registered Education Savings Plan, Pittsburgh
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- Rehabilitation Centers, Pittsburgh
- Rehabilitation Centers, Products & Services, Pittsburgh
- Rehabilitation Specialists, Pittsburgh
- Rehabilitational Job Training Services, Pittsburgh
- Relief Organizations, Pittsburgh
- Religious Education, Pittsburgh
- Religious Goods & Church Supplies Stores, Pittsburgh
- Religious Organizations, Pittsburgh
- Religious Practitioners, Pittsburgh
- Religious Services, Pittsburgh
- Relocation Services, Pittsburgh
- Rental & Leasing Business Equipment, Pittsburgh
- Rental Services, Pittsburgh
- Repair Services, Pittsburgh
- Repossession Services, Pittsburgh
- Reprographic Services, Pittsburgh
- Research & Development Bureaus, Pittsburgh - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Pittsburgh - Laboratories
- Research Service Libraries, Pittsburgh
- Research Services, Pittsburgh
- Residential, Pittsburgh
- Residential Apartments, Pittsburgh
- Residential Care Facilities, Pittsburgh
- Residential Construction Contractors, Pittsburgh - General Contractors
- Residential Construction Referral Services, Pittsburgh
- Residential Landfills, Pittsburgh
- Residential Real Estate - Rental & Leasing, Pittsburgh
- Residential Real Estate Companies, Pittsburgh
- Resins Wholesale & Retail, Pittsburgh - Plastic Raw Materials
- Resorts & Hotels, Pittsburgh
- Restaurant & Food Service Management Services, Pittsburgh
- Restaurant & Lounge, Bar, Or Pub, Pittsburgh
- Restaurant Equipment, Pittsburgh
- Restaurant Equipment & Supplies, Pittsburgh
- Restaurant Equipment Repair & Service, Pittsburgh - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurant Lobster, Pittsburgh
- Restaurant Management & Consulting, Pittsburgh - Food Facilities Consultants
- Restaurant Supplies & Equipment, Pittsburgh
- Restaurants - Breakfast Brunch Lunch, Pittsburgh
- Restaurants/Food & Dining, Pittsburgh
- Restoration Church, Pittsburgh
- Restoration Contractors, Pittsburgh
- Resume Service, Pittsburgh
- Retail Book Stores, Pittsburgh
- Retaining Wall Contractors, Pittsburgh - Build & Repair - Blocks, Concrete, Stones, etc
- Retirement & Estate Planning, Pittsburgh
- Retirement Communities & Home, Assisted Living & Apartments, Pittsburgh
- Retirement Communities & Homes, Pittsburgh
- Retirement Homes, Pittsburgh
- Retirement Planning Consultants & Services, Pittsburgh
- Retreat Facilities & Houses, Pittsburgh
- Reverends, Pittsburgh
- Rheumatologists, Pittsburgh - Rheumatology Doctors, Physicians & Surgeons
- Riding & Rodeo Services, Pittsburgh
- Riding Apparel & Equipment, Pittsburgh
- Riding Equipment, Pittsburgh
- Rigging Service & Crane Hoisting, Pittsburgh
- Risk Management Consultants, Pittsburgh
- Road Construction, Pittsburgh - Companies & Contractors
- Road Construction & Repair Contractors, Pittsburgh
- Road Construction Equipment & Machinery, Pittsburgh
- Roadside Assistance, Road Service & Towing Service, Pittsburgh
- Robots & Robotics System, Pittsburgh
- Rodeo & Equestrian Equipment & Supplies, Pittsburgh
- Rods, Springs & Suspension Equipment & Supplies, Pittsburgh
- Rolling Mill Machinery, Pittsburgh
- Roof Cleaning & Maintenance, Pittsburgh - Roofing Services
- Roof Repair, Pittsburgh - Roofing Repair Services
- Roofing & Siding Materials, Equipments & Supplies, Pittsburgh - Wholesale, Manufacturers & Suppliers
- Roofing Consultants, Pittsburgh - Roofing Companies
- Roofing Contractors, Pittsburgh - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Decks, Pittsburgh
- Roofing Materials & Supplies, Pittsburgh
- Rooming & Boarding Houses, Pittsburgh
- Rubber Products, Pittsburgh
- Rubber Products - Retail, Pittsburgh
- Rubber Stamps, Pittsburgh
- Rvs Sales, Rental & Leasing, Pittsburgh
- Ryder Truck Rental , Pittsburgh - Ryder Moving
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