Dates for your diary. 70th Anniversary events. Follow this link for further information

30th November 1951: This was the date that LEO triumphantly succeeded in running its Bakery Valuation programmes – the first piece of commercial business computing in the world. There will be a celebratory zoom at 18:30 on 30th November 2021. There will be some special messages – about LEO and Lyons and the premier of a new film about LEO. Please provide your own celebratory drink – or maybe a cup of tea and a piece of Swiss roll!

There will be a weekend of LEO events at the CCH in Cambridge see HERE

The link for the Zoom meeting is HERE

The link to the Youtube Film is HERE

The link to Youtube above will play a trailer until 7 pm on Tuesday 30th November when the film is released.

December 15th 2021  17.00 GMT  Zoom forum

January 18th 2022  10.30am GMT  We hope to bring you a presentation on the LEO archive at CCH.

REUNION and LEO Exhibition: Sunday, 10th April 2022 (new date due to Covid postponements).

From midday at the Victory Services Club, Marble Arch, London W2 2HF. As usual this will be an opportunity to meet old friends and colleagues and others with an interest in early computing. There will be refreshments and exhibitions of LEO related materials – as well as the usual raffle! Details to follow in the new year.

Tickets (to include a light lunch) cost £27 if bought before 31st January 2022 (£30 thereafter.)

If you have any queries about this event or wish to book tickets, please email

And finally…..

We are currently working on the second edition of ‘LEO remembered’. We are, therefore, inviting you to send in reminiscences to be added to the collection. We are looking for stories of events, anecdotes, memories of what the work was actually like, what it felt like working in a new and fast-developing industry. For the anthology, we are not looking for complete work biographies. (If you would like to contribute a biography to our archives, that would be very welcome, of course – but not what we are collecting for the book.) Some of you may have already contributed oral histories or longer reminiscences to our archive – might you be able to create an article for the anthology based on these?

The ideal word length is between about 500 -900 words. We have arranged the book in sections roughly by date so please attach a note with the dates you worked on LEO. Please do send in your contributions to  – or if you would like to discuss this further, please do contact Hilary Caminer. May we ask for a speedy turnaround? We would like to receive contributions by the end of November 2021.

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