| B. A. Reader | No tapes | No tapes | No books | No hardware |
| BASICare Microsystem | No tapes | No tapes | No books | No hardware |
| B. Britten | No tapes | No tapes | No books | No hardware |
| B. L. Cotgrove | No tapes | No tapes | No books | No hardware |
| B. Rao | No tapes | No tapes | No books | No hardware |
| Babtech | Tapes | No tapes | No books | No hardware |
| Bantam | No tapes | No tapes | Books | No hardware |
| Bernard Babani | No tapes | No tapes | Books | No hardware |
| Bi-Pak | No tapes | No tapes | No books | Hardware |
| Bolton Electronics | No tapes | No tapes | No books | No hardware |
| Brian Negus | No tapes | No tapes | No books | No hardware |
| Bridge Software | Tapes | No tapes | No books | No hardware |
| British Sporting Services | No tapes | No tapes | No books | No hardware |
| Bug Byte | Tapes | Tapes sorted by code | No books | No hardware |
| Butronics | No tapes | No tapes | No books | No hardware |
| Bytronic Associates | No tapes | No tapes | No books | No hardware |