| 7020 | Real estate dealers | |
| 7010 | Real estate developers, non residential | |
| 6599 | Real estate investment trust fund, trust companies | |
| 6599 | Real estate investment trusts (REIT's) | |
| 6599 | Real estate investment trusts, primarily investing in mortgages or construction loans | |
| 7411 | Real estate law, private practice | |
| 7020 | Real estate management | |
| 7020 | Real estate managers, non residential | |
| 7020 | Real estate managers, residential | |
| 7020 | Real estate office | |
| 7010 | Real estate operating, non-residential buildings | |
| 7010 | Real estate operating, residential buildings | |
| 7020 | Real estate rental agents | |
| 7020 | Real estate sales | |
| 7020 | Real estate sales and brokerage services | |
| 8090 | Real estate schools | |
| 7020 | Real estate selling agents | |
| 7020 | Real estate service | |
| 7010 | Real estate subdividers, residential | |
| 6603 | Real estate title insurance | |
| 7411 | Real estate title searching and consulting | |
| 7020 | Real estate transactions | |
| 7020 | Real property appraisals | |
| 7010 | Real property subdividers and developers (except of cemetery lots) | |
| 7511 | Real property tax, local administration | |
| 7499 | Real time closed captioning (i.e., simultaneous) | |
| 7020 | Realtor | |
| 7020 | Realty company | |
| 2893 | Reamers (i.e., machine tool accessory), manufacturing | |
| 5150 | Reamers, wholesale | |
| 2922 | Reaming machines, metalworking, manufacturing | |
| 0140 | Reaping services | |
| 3430 | Rear-view mirrors in mountings, motor vehicle, manufacturing | |
| 2710 | Rebar (i.e., concrete reinforcing bar), manufacturing | |
| 4520 | Rebars (deformed steel bars for concrete reinforcement), installation | |
| 2222 | Rebinding books, magazines, or pamphlets | |
| 3410 | Rebuilding automotive and truck gasoline engines | |
| 3140 | Rebuilding batteries (storage) | |
| 2911 | Rebuilding hydraulic turbines | |
| 2922 | Rebuilding machine tools, metal cutting types | |