| 3610 | Radio cabinets and cases, wood, manufacturing | |
| 9214 | Radio commentators, independent | |
| 5150 | Radio communications equipment, wholesale | |
| 7421 | Radio consulting services | |
| 2212 | Radio guide, publishers | |
| 2212 | Radio guide, publishing | |
| 2212 | Radio guide, publishing and printing combined | |
| 3230 | Radio headphones, manufacturing | |
| 2520 | Radio housings, plastic, manufacturing | |
| 3312 | Radio magnetic instrumentation (RMI), manufacturing | |
| 6420 | Radio paging communications carriers | |
| 5150 | Radio parts and accessories, wholesale | |
| 6303 | Radio positioning service, ship navigation | |
| 9213 | Radio program (except live) production (except independent producers) | |
| 9213 | Radio programs (including commercials), producers of | |
| 5150 | Radio receiving and transmitting tubes, wholesale | |
| 5233 | Radio receiving sets, household, retail | |
| 3230 | Radio receiving sets, manufacturing | |
| 5260 | Radio repair shop | |
| 2212 | Radio schedules and guides, publisher | |
| 2212 | Radio schedules and guides, publishing | |
| 2212 | Radio schedules and guides, publishing and printing combined | |
| 9213 | Radio stations | |
| 7499 | Radio transcription service | |
| 3220 | Radio transmitting antennas and ground equipment, manufacturing | |
| 4520 | Radio transmitting tower construction, general contractors | |
| 3130 | Radio wire and cable, insulated, manufacturing | |
| 5233 | Radio, stereo and television stores | |
| 2330 | Radioactive elements, manufacturing | |
| 7421 | Radioactive geophysical surveying services | |
| 2423 | Radioactive in-vivo diagnostic substances, manufacturing | |
| 2330 | Radioactive isotopes, manufacturing | |
| 1200 | Radioactive ore mining | |
| 5139 | Radioactive pharmaceutical isotopes, wholesale | |
| 9000 | Radioactive waste disposal service | |
| 3312 | Radioactivity detection, identification and computation (RADIAC) equipment, manufacturing | |
| 3312 | Radiofrequency measuring equipment, manufacturing | |
| 3312 | Radiofrequency oscillators, manufacturing | |
| 7422 | Radiographic testing services | |
| 8519 | Radiological laboratory services, medical | |