Join the LEO Computers Society.

The LEO Computers Society started life as a group of ex LEO people who wanted to communicate and meet up to talk about the early development of the Lyons Electronic Office. It has evolved into a society that is dedicated to discovering and recording for posterity the remarkable development of the world’s first business computer.
Membership is open to anyone who shares an interest in this development and we encourage you to provide information about your interest in LEO and your career. This information is shared with other members, but personal and communications details such as addresses and numbers are not.

We stress that all are welcome if they have an interest, especially educators.

Membership is, at the present, free. If you have any material, photos, memorabilia or text relevant to LEO please let us know via the option boxes at the end. If you wish to make a voluntary contribution please email

After you have completed and submitted this form you should receive an email inviting you to confirm your email address. If you don’t receive this email within 5 minutes please check in your spam/junk to see if it has gone there. If you are still having problems email with details to

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