Contents:
- Basic Four Corporation
- BDP (Word Processing) Ltd
- Beckman Instruments
- Bell & Howell Business Equipment
- Bell Telephone
- Belling & Lee Ltd
- Bendix
- Benson Electronics Ltd
- BFI Electronics
- Billing Machines
- Biomation
- B & K Laboratories
- Block & Anderson
- Bodine Electric Co
- Borer Electronics
- Bowmar Instrument Ltd
- BPC
- Britec Ltd
- British Olivetti Ltd
- British Tabulating Machine Co
- Broughtons of Bristol
- Brunsviga
- Bryant Computer Products
- BTI
- Buckmaster & Moore
- Bull
- Bulmers (Calculators) Ltd