- Racing Car Supplies, College Park
- Radio & Television Repair Shops , College Park - TV Repair
- Radio Stations & Broadcasting Companies, College Park
- Railroad Companies, College Park
- Real Estate, College Park - Agent, Broker & Companies
- Real Estate Appraiser, College Park - Appraisal Services
- Real Estate Appraisers & Consulting Services, College Park
- Real Estate Consultants, College Park
- Real Estate Developers, College Park
- Real Estate Management, College Park
- Real Estate Services, College Park
- Records, Tapes, CDs - Used & Vintage, College Park
- Recreation Management Services, College Park
- Recycling Drop-Off Centers, College Park
- Recycling Scrap & Waste Materials, College Park - Scrap Metal, etc
- Rehabilitation Centers, Products & Services, College Park
- Rehabilitation Specialists, College Park
- Rehabilitational Job Training Services, College Park
- Religious Education, College Park
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- Religious Organizations, College Park
- Rental & Leasing Business Equipment, College Park
- Repair Services, College Park
- Research Service Libraries, College Park
- Research Services, College Park
- Residential, College Park
- Residential Apartments, College Park
- Residential Care Facilities, College Park
- Residential Construction Contractors, College Park - General Contractors
- Restaurant & Lounge, Bar, Or Pub, College Park
- Restaurants/Food & Dining, College Park
- Resume Service, College Park
- Retail Book Stores, College Park
- Retirement Communities & Homes, College Park
- Roof Repair, College Park - Roofing Repair Services
- Roofing Consultants, College Park - Roofing Companies
- Roofing Contractors, College Park - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rooming & Boarding Houses, College Park
- Rv Parks, College Park
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