| R. Clark | No tapes | No tapes | No books | No hardware |
| RD Laboratories | No tapes | No tapes | No books | No hardware |
| Robert S. Armitage | Tapes | No tapes | No books | No hardware |
| Redditch Electronics | No tapes | No tapes | No books | No hardware |
| Reston Publishing Company | No tapes | No tapes | Books | No hardware |
| Richard Francis | No tapes | No tapes | Books | No hardware |
| Richard Shepherd | No tapes | No tapes | No books | No hardware |
| R & R Software | Tapes | No tapes | No books | No hardware |
| Romik Software | Tapes | Tapes sorted by code | No books | No hardware |
| Rompak | No tapes | No tapes | No books | Hardware |
| Rose Cassettes | Tapes | No tapes | No books | No hardware |
| Rowlands and Simmonds | No tapes | No tapes | No books | No hardware |