- Race Tracks
- Radiators-Automotive & Industrial-Rebuilding & Repairing
- Radio Communication Equipment & Systems
- Radio Station & Broadcasting Companies
- Real Estate
- Real Estate Agents
- Real Estate Appraisers
- Real Estate Consultants
- Real Estate Developers
- Recording Service-Sound & Video
- Refrigerating Equipment-Commercial-Sales
- Refrigerating Equipment-Commercial-Supplies & Parts
- Refrigerators & Freezers-Service & Repair
- Rehabilitation Clinics & Services
- Religious Organizations
- Relocation Services
- Restaurants
- Road Building Contractors
- Roofing Materials
- Rubber Stamps-Manufacturing Equipment & Supplies