Computer ◆ Conservation ◆ Society
-: Our Computer Heritage Project :-

Some of the systems covered on the Our Computer Heritage Site.


Here you'll find technical information on two groups of early British-designed computers:

The first group covers Mainframe computers manufactured by six historic UK companies that came onto the market in the period 1950-1965;
Elliott Brothers (London) Ltd.;
Ferranti Ltd.;
Leo Computers Ltd.;
English Electric Ltd.;

The second group covers minicomputers that came onto the market in the period 1965-1985, manufactured by:
Business Computers Ltd.;
Computer Technology Ltd.;
Ferranti Ltd.;
High Level Hardware Ltd.;
Information Computer Systems.;

To see detailed technical information on the deliveries and applications, hardware and software, etc., for these early British computers, follow the links in the menu on the left. If you are new to the computer terminology of the 1940s and 1950s, you may find the Glossary helpful. If you'd like to see which UK museums have displays or items of equipment from the early British computers featured on this site, click on Where to see bits.

The information on this website has been collected since 2004 by volunteers from the Computer Conservation Society (CCS). The names of individuals and organisations who have helped with our computer history project are given under Acknowledgements.

©2012-2022 Computer Conservation Society All Rights Reserved The material and its presentation on this site is the copyright of its owners and the Computer Conservation Society. You are free to enjoy and use any of the material for non-commercial purposes without charge, provided that it is not used misleadingly. Please acknowledge the Computer Conservation Society website as the source of the material. Note that this permission does not extend to any material on this site which is identified as requiring permission from its third party copyright holder. Please seek specific permission to use such material. We try to ensure that the material on this site is accurate, but there may be inaccuracies, omissions or out-of-date information. We can take no responsibility for its misuse, and cannot be held liable for any errors or loss which may arise. We encourage hyperlinks to this website.

If you have any queries, please Contact the Computer Conservation Society: or e-mail the Content Manager at:


Edited April 2022 NWB