| radio broadcasting companies | radio communication equipment | radio repair |
| radio stations | radiotelephone communication | railroads |
| real estate | real estate agents | real estate attorney |
| real estate investment trusts | real estate manager | real estate school |
| recreation | recreation clubs | rectal surgeons |
| refiners | refrigeration equipment | related devices |
| related material | religious organizations | repair service |
| residential care | residential construction | restaurant |
| restaurant architects | restaurant consultants | restaurant cuisines |
| restaurant equipment | restaurant equipment supply | restaurant supply |
| retail nurseries | rivets | roofing |
| roofing contractors | roofing supply | rug cleaners |
| rug dealers | russian restaurant |
