| radio broadcasting companies | radio broadcasting stations | radio communication equipment |
| radio repair | radio services | radio stations |
| radiotelephone communication | railroad car leasing | railroads |
| railroad transportation | ready manufacturers | ready mixed concrete |
| ready mixed concrete manufacturers | real estate | real estate agents |
| real estate attorney | real estate investment trusts | real estate manager |
| real estate school | real property lessors | reconstituted wood products |
| record manufacturers | recreation | recreational camps |
| recreational vehicle dealers | recreation clubs | recreation goods |
| rectal surgeons | refiners | refiners precious metals |
| refractory | refractory materials | refrigerated storage |
| refrigerated warehousing | refrigeration equipment | refrigeration manufacturers |
| refrigeration repair | refrigeration services | refrigeration supply |
| refuse systems | regulation | regulation of agricultural marketing |
| related devices | related material | related products |
| related products manufacturers | related work | relays controls |
| religious organizations | repair service | residential care |
| residential construction | residential lighting fixtures | restaurant |
| restaurant architects | restaurant consultants | restaurant cuisines |
| restaurant equipment | restaurant equipment repair | restaurant equipment supply |
| restaurant supply | retail bakeries | retail nurseries |
| reupholstery repair | rivets | rivets manufacturers |
| roller bearing | roofing | roofing contractors |
| roofing equipment | roofing supply | rug cleaners |
| rug dealers | rug dealers new | rural bus transportation |
| russian restaurant |
