- Radio & Television Repair Shops , Seaford - TV Repair
- Radio Communications Equipment & Systems , Seaford
- Radio Stations & Broadcasting Companies, Seaford
- Raw Products, Seaford
- Real Estate, Seaford - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Seaford
- Real Estate Appraiser, Seaford - Appraisal Services
- Real Estate Appraisers & Consulting Services, Seaford
- Real Estate Developers, Seaford
- Real Estate Management, Seaford
- Real Estate Services, Seaford
- Real Estate Services Franchises, Seaford
- Recreational Good Manufacturers, Seaford
- Recycling Drop-Off Centers, Seaford
- Refrigeration Repair & Service, Seaford - Ac, Freezer, Refrigerator Repair
- Rehabilitation Centers, Products & Services, Seaford
- Rehabilitation Specialists, Seaford
- Rehabilitational Job Training Services, Seaford
- Religious Organizations, Seaford
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- Religious Practitioners, Seaford
- Rental Property Management, Seaford
- Repair Services, Seaford
- Research & Development Labs, Seaford - Laboratories
- Research Services, Seaford
- Residential, Seaford
- Residential Apartments, Seaford
- Residential Construction Contractors, Seaford - General Contractors
- Residential Lighting Fixtures Manufacturers, Seaford
- Residential Real Estate Companies, Seaford
- Restaurants/Food & Dining, Seaford
- Restoration Church, Seaford
- Retirement Communities & Home, Assisted Living & Apartments, Seaford
- Riding & Rodeo Services, Seaford
- Road Construction, Seaford - Companies & Contractors
- Rodeo & Equestrian Equipment & Supplies, Seaford
- Roofing Consultants, Seaford - Roofing Companies
- Roofing Contractors, Seaford - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Seaford
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