- Radiator Coolant & Solvents, Trinidad - Engine Coolant
- Radiator Repair, Trinidad - Gas Tank Repair
- Radio Stations & Broadcasting Companies, Trinidad
- Radiotelephone Communications, Trinidad
- Railroad, Trinidad - Commuter & Passenger Transport
- Ready Mix Concrete, Trinidad - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Trinidad
- Real Estate, Trinidad - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Trinidad
- Real Estate Appraiser, Trinidad - Appraisal Services
- Real Estate Appraisers & Consulting Services, Trinidad
- Real Estate Attorneys & Lawyers, Trinidad
- Real Estate Attorneys & Lawyers, Trinidad
- Real Estate Developers, Trinidad
- Real Estate Lawyers & Attorneys, Trinidad
- Real Estate Services, Trinidad
- Recreational Equipment & Supplies Companies, Trinidad
- Recycling Drop-Off Centers, Trinidad
- Recycling Scrap & Waste Materials, Trinidad - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Trinidad
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- Refrigeration & Air Conditioning Contractors, Trinidad - Installation, Repair, Sales & Service
- Rehabilitation Centers, Products & Services, Trinidad
- Rehabilitation Specialists, Trinidad
- Religious Education, Trinidad
- Religious Organizations, Trinidad
- Repair Services, Trinidad
- Repossession Services, Trinidad
- Research Services, Trinidad
- Residential, Trinidad
- Residential Apartments, Trinidad
- Residential Care Facilities, Trinidad
- Residential Construction Contractors, Trinidad - General Contractors
- Restaurant & Lounge, Bar, Or Pub, Trinidad
- Restaurant Equipment, Trinidad
- Restaurant Equipment & Supplies, Trinidad
- Restaurant Supplies & Equipment, Trinidad
- Restaurants/Food & Dining, Trinidad
- Retail Book Stores, Trinidad
- Retreat Facilities & Houses, Trinidad
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