LEO editor


September 1951  – At J. Lyons & Co on Wednesday, 5th September 1951 the Bakery Valuations programme was run to completion on real data as an experiment to test the hardware.  As noted in Ernest Lenaerts notebook for that date it ran from 3:50 to 5:35 without a fault and was the longest run of any programme at that time.

Zoom For LEO Computers Society Members

We are organizing a new series of Zoom Meetings.

See Below

Wednesday Online celebrations!

During the past year we have discovered that online forums and presentations have been a great way to get our members together. Zoom has allowed former colleagues, now living in different continents to reminisce together and for, 22nd September 17.00 BST AGM including updates on all our activities and a vote for Trustees. This will be followed by a discussion among members on ideas for the future. 

Tuesday, 19th October 10.30 BST   We hope to bring you a tour of The National Museum of Computing at Bletchley Park. As many of you will know, TNMoC has a reconstruction of EDSAC, the computer built at Cambridge which Lyons helped to fund so that they could develop a commercial computer for themselves.

Wednesday, 17th November 15.00 GMT  Our new LEO Film! By this date in 1951, LEO was almost ready to run its first regular clerical run working on the Lyons Bakery Valuations Job.  As part of our National Lottery Heritage Fund programme, we have had a 15 minute film made about LEO. This will be given its press launch in late November to chime with the actual anniversary itself, but we have managed to arrange for our members to be given an exclusive pre-launch viewing. The film will be followed by an opportunity for members to comment and for a discussion with the filmmakers.


Antiques Road Trip

The BBC programme Antiques Road Trip made a stop off at Cambridge to visit the Cambridge Computer History Museum and interviewed Jason Fitzpatrick the Museum founder. Jason covered many interesting topics including early calculators, EDSAC, LEO and the BBC Micro and ARM chips.

You can hear and view the section from Cambridge Here

LEO Matters May 2021 Vol 9

LEO Matters from May 2021 in desktop published format. Edited by Hilary Caminer and published by Bernard Behr.

Contents: (Clicking on the highlights below will take you straight to the page containing the item highlighted. To open the whole document click on the image of the front page.

Date : November 2020

70th Anniversary

2021 marks LEO’s 70th Anniversary Year – unfortunately the Trustees felt they had to postpone the Reunion from 2021 but replace it with a series of Zoom events to celebrate the events of 1951 (see the post on the new Zoom dates) The new date for the Reunion at the Victory Services Club is Sunday, 10th April 2022

See Here for the new Zoom dates

New Date for Reunion

There is a revised date for our Reunion –   Sunday, 10th April 2022. Details will follow