| R |
| Racetracks | 462 |
| Racks | 462 |
| Radar Equipment & Supplies | 462 |
| Radiators-Automotive | 463 |
| Radiators-Industrial | 463 |
| Radio Communication Equipment & Systems | 463 |
| Radio Station & Broadcasting Companies | 463 |
| Radio Station Equipment | 464 |
| Railings | 464 |
| Railroad Contractors | 464 |
| Railroad Equipment & Supplies | 464 |
| Railroads | 464 |
| Rainwear | 464 |
| Ranges & Ovens-Service & Repair | 464 |
| Ranges & Ovens-Supplies & Parts | 464 |
| Real Estate | 465 |
| Real Estate Appraisers | 467 |
| Real Estate-Brokers | 467 |
| Real Estate-Commercial & Industrial | 467 |
| Real Estate Consultants | 468 |
| Real Estate Developers | 468 |
| Real Estate Investments | 468 |
| Real Estate Leasing | 468 |
| Real Estate Loans | 468 |
| Real Estate Management | 469 |
| Real Estate Rental Service | 469 |
| Record Companies | 469 |
| Recording Service-Sound & Video | 469 |
| Records Destruction | 469 |
| Records Storage | 469 |
| Records, Tapes & Compact Discs | 469 |
| Records, Tapes & Compact Discs- Production | 469 |
| Consultants |
| Records, Tapes & Compact Discs- Whsle & Mfrs | 469 |
| Recreation Centers | 469 |
| Recreational Vehicles-Dealers | 470 |
| Recreational Vehicles-Equipment, Parts & | 470 |
| Supplies |
| Recreational Vehicles-Renting & Leasing | 470 |
| Recreational Vehicles-Repairing & Service | 470 |
| Recreational Vehicles-Storage | 470 |
| Recruiting-U.S. Armed Forces | 470 |
| Recycling Centers | 471 |
| Refrigeration Equipment-Commercial & | 471 |
| Individual |
| Refrigeration Equipment-Commercial & Industrial | 471 |
| -Sales & Service |
| Refrigeration Equipment-Supplies & Parts | 471 |
| Refrigerators & Freezers-Dealers | 471 |
| Refrigerators & Freezers-Service & Repair | 472 |
| Refrigerators & Freezers-Supplies & Parts | 472 |
| Rehabilitation Services | 472 |
| Religious Goods | 473 |
| Religious Organizations | 473 |
| Relocation Service | 473 |
| Remodeling Service | 474 |
| Rental Service Stores & Yards | 474 |
| Rental Vacancy Listing Service | 475 |
| Repossessing Service | 475 |
| Research Service | 475 |
| Resorts | 475 |
| Rest Homes-Information & Placement Bureaus | 475 |
| Restaurant Cleaning | 475 |
| Restaurant Equipment & Supplies | 475 |
| Restaurant Equipment-Repairing & Servicing | 475 |