- Racing Car Supplies, Norristown
- Racquetball Courts, Norristown
- Radio & Television Repair Shops , Norristown - TV Repair
- Radio Broadcasting Program Producers, Norristown
- Radio Stations & Broadcasting Companies, Norristown
- Radiologists, Norristown - Radiology Doctors, Physicians & Surgeons
- Radiology Equipment & Services, Norristown - X-Ray Equipment & Supplies
- Radiotelephone Communications, Norristown
- Radon Testing & Services, Norristown
- Rail Line Travel Agents & Agencies, Norristown
- Railroad, Norristown - Commuter & Passenger Transport
- Railroad Companies, Norristown
- Range & Oven Repair, Service & Sales, Norristown
- Reading Instruction Schools, Norristown
- Ready Mix Concrete, Norristown - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Norristown
- Real Estate, Norristown - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Norristown
- Real Estate Agent - Property Lessors, Norristown
- Real Estate Appraiser, Norristown - Appraisal Services
- Real Estate Appraisers & Consulting Services, Norristown
- Real Estate Auctioneers, Norristown
- Real Estate Broker, Norristown
- Real Estate Consultants, Norristown
- Real Estate Developers, Norristown
- Real Estate Management, Norristown
- Real Estate Rentals, Norristown
- Real Estate Services, Norristown
- Record Destruction Service, Norristown
- Record Storage, Destruction & Management, Norristown
- Recording Studio - Equipment & Rental, Norristown
- Records, Tapes, CDs - Used & Vintage, Norristown
- Recreational Equipment Repair & Service, Norristown
- Recreational Good Manufacturers, Norristown
- Recreational Organizations, Norristown
- Recycling Drop-Off Centers, Norristown
- Recycling Scrap & Waste Materials, Norristown - Scrap Metal, etc
- Refrigeration & Cooling Equipment, Parts & Supplies , Norristown - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Norristown - Ac, Freezer, Refrigerator Repair
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- Refrigerator Sales, Service & Repair, Norristown - Fridge
- Refuse Collection & Disposal Services, Norristown
- Refuse Systems & Garbage Disposal, Norristown
- Rehabilitation Centers, Products & Services, Norristown
- Rehabilitation Specialists, Norristown
- Rehabilitational Job Training Services, Norristown
- Religious Education, Norristown
- Religious Organizations, Norristown
- Religious Services, Norristown
- Rental & Leasing Business Equipment, Norristown
- Repair Services, Norristown
- Repossession Services, Norristown
- Research & Development Bureaus, Norristown - Commercial, Economic, Sociological & Educational Research
- Research Services, Norristown
- Residential, Norristown
- Residential Apartments, Norristown
- Residential Care Facilities, Norristown
- Residential Construction Contractors, Norristown - General Contractors
- Restaurant & Lounge, Bar, Or Pub, Norristown
- Restaurant Equipment, Norristown
- Restaurant Equipment & Supplies, Norristown
- Restaurant Lobster, Norristown
- Restaurant Management & Consulting, Norristown - Food Facilities Consultants
- Restaurant Supplies & Equipment, Norristown
- Restaurants/Food & Dining, Norristown
- Retail Book Stores, Norristown
- Retirement Communities & Home, Assisted Living & Apartments, Norristown
- Riding & Rodeo Services, Norristown
- Rigging Service & Crane Hoisting, Norristown
- Road Construction, Norristown - Companies & Contractors
- Road Construction & Repair Contractors, Norristown
- Roadside Assistance, Road Service & Towing Service, Norristown
- Rods, Springs & Suspension Equipment & Supplies, Norristown
- Roofing Consultants, Norristown - Roofing Companies
- Roofing Contractors, Norristown - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Norristown
- Rubbish Handling Equipment, Norristown - Garbage Containers
- RV & Campers Repair & Service, Norristown
- RV Repair, Norristown - Recreational Vehicle
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