- Radio & Television Repair Shops , Williamsport - TV Repair
- Radio Communications Equipment & Systems , Williamsport
- Radio Stations & Broadcasting Companies, Williamsport
- Real Estate, Williamsport - Agent, Broker & Companies
- Real Estate & Property Brokers, Williamsport
- Real Estate Developers, Williamsport
- Real Estate Services, Williamsport
- Recycling Drop-Off Centers, Williamsport
- Refuse Collection & Disposal Services, Williamsport
- Rehabilitation Centers, Products & Services, Williamsport
- Rehabilitation Specialists, Williamsport
- Religious Organizations, Williamsport
- Repair Services, Williamsport
- Residential, Williamsport
- Residential Apartments, Williamsport
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- Residential Care Facilities, Williamsport
- Restaurant & Food Service Management Services, Williamsport
- Restaurant Equipment, Williamsport
- Restaurant Equipment & Supplies Manufacturers, Williamsport
- Restaurant Supplies & Equipment, Williamsport
- Restaurants - Breakfast Brunch Lunch, Williamsport
- Restaurants/Food & Dining, Williamsport
- Retirement & Estate Planning, Williamsport
- Retirement Communities & Home, Assisted Living & Apartments, Williamsport
- Retirement Planning Consultants & Services, Williamsport
- Roofing Consultants, Williamsport - Roofing Companies
- Roofing Contractors, Williamsport - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Williamsport
- Rv Parks, Williamsport
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