- Racing Car Supplies, Newark
- Radiator Repair, Newark - Gas Tank Repair
- Radiator Repair & Rebuild, Newark
- Radio & Television Repair Shops , Newark - TV Repair
- Radio Communications Equipment & Systems , Newark
- Radio Stations & Broadcasting Companies, Newark
- Radiologists, Newark - Radiology Doctors, Physicians & Surgeons
- Radiology Equipment & Services, Newark - X-Ray Equipment & Supplies
- Radiotelephone Communications, Newark
- Railroad Companies, Newark
- Reading Instruction Schools, Newark
- Ready Mix Concrete, Newark - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Newark
- Real Estate, Newark - Agent, Broker & Companies
- Real Estate & Property Brokers, Newark
- Real Estate Agencies, Newark
- Real Estate Agent & Broker Services, Newark
- Real Estate Agent - Property Lessors, Newark
- Real Estate Appraiser, Newark - Appraisal Services
- Real Estate Appraisers & Consulting Services, Newark
- Real Estate Attorneys & Lawyers, Newark
- Real Estate Attorneys & Lawyers, Newark
- Real Estate Consultants, Newark
- Real Estate Developers, Newark
- Real Estate Lawyers & Attorneys, Newark
- Real Estate Listings Services, Newark
- Real Estate Management, Newark
- Real Estate Rentals, Newark
- Real Estate Services, Newark
- Reconstructionist Synagogues, Newark
- Record Destruction Service, Newark
- Record Storage, Destruction & Management, Newark
- Recording Studio - Equipment & Rental, Newark
- Records, Tapes, CDs - Used & Vintage, Newark
- Recreational Equipment Repair & Service, Newark
- Recreational Services, Newark
- Recycling Drop-Off Centers, Newark
- Recycling Scrap & Waste Materials, Newark - Scrap Metal, etc
- Red Wing Shoes, Newark
- Reducing Exercise & Weight Control Services, Newark
- Refrigerated Beverage Dispenser, Newark - Water Coolers Equipment & Supplies
- Refrigerated Storage & Warehouse, Newark - Warehousing
- Refrigeration & Air Conditioning Contractors, Newark - Installation, Repair, Sales & Service
- Refrigeration & Cooling Equipment, Parts & Supplies , Newark - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Newark - Ac, Freezer, Refrigerator Repair
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- Refrigerator Sales, Service & Repair, Newark - Fridge
- Refuse Collection & Disposal, Newark
- Refuse Systems & Garbage Disposal, Newark
- Rehabilitation Centers, Newark
- Rehabilitation Centers, Products & Services, Newark
- Rehabilitation Specialists, Newark
- Rehabilitational Job Training Services, Newark
- Religious Apparel & Vestments, Newark
- Religious Goods & Church Supplies Stores, Newark
- Religious Organizations, Newark
- Religious Practitioners, Newark
- Religious Services, Newark
- Relocation Services, Newark
- Rental & Leasing Business Equipment, Newark
- Repair Services, Newark
- Repossession Services, Newark
- Research & Development Bureaus, Newark - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Newark - Laboratories
- Research Services, Newark
- Residential, Newark
- Residential Apartments, Newark
- Residential Architect, Newark
- Residential Care Facilities, Newark
- Residential Construction Contractors, Newark - General Contractors
- Residential Electricians, Newark - Electric Contractors
- Restaurant & Food Service Management Services, Newark
- Restaurant & Lounge, Bar, Or Pub, Newark
- Restaurant Equipment Cleaning, Newark - Restaurant Cleaners
- Restaurant Management & Consulting, Newark - Food Facilities Consultants
- Restaurants/Food & Dining, Newark
- Restoration Contractors, Newark
- Retail Book Stores, Newark
- Retirement & Estate Planning, Newark
- Retirement Communities & Home, Assisted Living & Apartments, Newark
- Retirement Communities & Homes, Newark
- Retirement Planning Consultants & Services, Newark
- Reverends, Newark
- Rheumatologists, Newark - Rheumatology Doctors, Physicians & Surgeons
- Robots & Robotics System, Newark
- Roof Cleaning & Maintenance, Newark - Roofing Services
- Roofing Consultants, Newark - Roofing Companies
- Roofing Contractors, Newark - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Newark
- Rubber Products - Retail, Newark
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