- Racing Car Supplies, Campbell
- Radiator Coolant & Solvents, Campbell - Engine Coolant
- Radio & Television Repair Shops , Campbell - TV Repair
- Radio Stations & Broadcast Companies, Campbell - Radio, Television & Publishers Representatives
- Radiotelephone Communications, Campbell
- Razors & Supplies, Campbell
- Real Estate, Campbell - Agent, Broker & Companies
- Real Estate & Insurance Schools, Campbell
- Real Estate Agencies, Campbell
- Real Estate Agent & Broker Services, Campbell
- Real Estate Agent - Property Lessors, Campbell
- Real Estate Appraiser, Campbell - Appraisal Services
- Real Estate Appraisers & Consulting Services, Campbell
- Real Estate Attorneys & Lawyers, Campbell
- Real Estate Broker, Campbell
- Real Estate Consultants, Campbell
- Real Estate Developers, Campbell
- Real Estate Loans & Contracts, Campbell
- Real Estate Management, Campbell
- Real Estate Properties, Campbell
- Real Estate Property Investment Properties, Campbell
- Real Estate Rentals, Campbell
- Real Estate Services, Campbell
- Real Estate Support Services, Campbell
- Record Storage, Destruction & Management, Campbell
- Recording Studio Equipment, Campbell
- Records, Tapes, CDs - Used & Vintage, Campbell
- Recreational Organizations, Campbell
- Recycling Drop-Off Centers, Campbell
- Recycling Scrap & Waste Materials, Campbell - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Campbell
- Refrigeration & Air Conditioning Contractors, Campbell - Installation, Repair, Sales & Service
- Refrigeration & Cooling Equipment, Parts & Supplies , Campbell - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Campbell - Ac, Freezer, Refrigerator Repair
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- Refrigerator Sales, Service & Repair, Campbell - Fridge
- Rehabilitation Centers, Campbell
- Rehabilitation Centers, Products & Services, Campbell
- Rehabilitation Specialists, Campbell
- Rehabilitational Job Training Services, Campbell
- Religious Education, Campbell
- Religious Goods & Church Supplies Stores, Campbell
- Religious Organizations, Campbell
- Repair Services, Campbell
- Reprographic Services, Campbell
- Research & Development Bureaus, Campbell - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Campbell - Laboratories
- Research Service Libraries, Campbell
- Research Services, Campbell
- Residential, Campbell
- Residential Apartments, Campbell
- Residential Architect, Campbell
- Residential Care Facilities, Campbell
- Residential Construction Contractors, Campbell - General Contractors
- Residential Electricians, Campbell - Electric Contractors
- Residential Lighting Fixtures Manufacturers, Campbell
- Restaurant & Lounge, Bar, Or Pub, Campbell
- Restaurant Equipment Repair & Service, Campbell - Bakery, Beverage, Food & Soda Fountain Equipment
- Restaurants - Breakfast Brunch Lunch, Campbell
- Restaurants/Food & Dining, Campbell
- Resume Service, Campbell
- Retail Book Stores, Campbell
- Retaining Wall Contractors, Campbell - Build & Repair - Blocks, Concrete, Stones, etc
- Retirement Communities & Home, Assisted Living & Apartments, Campbell
- Rigging Service & Crane Hoisting, Campbell
- Roadside Assistance, Road Service & Towing Service, Campbell
- Rocks Minerals & Fossils, Campbell
- Roofing Consultants, Campbell - Roofing Companies
- Roofing Contractors, Campbell - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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