- Radiator Coolant & Solvents, Newark - Engine Coolant
- Radiator Repair, Newark - Gas Tank Repair
- Radio Stations & Broadcasting Companies, Newark
- Real Estate, Newark - Agent, Broker & Companies
- Real Estate Appraisers & Consulting Services, Newark
- Real Estate Attorneys & Lawyers, Newark
- Real Estate Consultants, Newark
- Real Estate Lawyers & Attorneys, Newark
- Real Estate Services, Newark
- Recreational Services, Newark
- Recycling Drop-Off Centers, Newark
- Refrigerator Sales, Service & Repair, Newark - Fridge
- Rehabilitation Centers, Products & Services, Newark
- Rehabilitation Specialists, Newark
- Relief Organizations, Newark
- Religious Organizations, Newark
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- Religious Practitioners, Newark
- Rental & Leasing Business Equipment, Newark
- Repair Services, Newark
- Residential, Newark
- Residential Apartments, Newark
- Residential Care Facilities, Newark
- Residential Construction Contractors, Newark - General Contractors
- Resource Centers, Newark
- Restaurants/Food & Dining, Newark
- Retirement & Estate Planning, Newark
- Retirement Communities & Home, Assisted Living & Apartments, Newark
- Retirement Planning Consultants & Services, Newark
- Reweaving & Mending Services, Newark
- Roofing Consultants, Newark - Roofing Companies
- Roofing Contractors, Newark - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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