LEO editor

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 – watch this space for plans, Covid permitting, to mark the events of 1951

New Date for Reunion

There is a revised date for our Reunion –  Sunday, 17th October 2021. Details will follow

Princess Elizabeth’s visit to Cadby Hall on 15 February 1951

On 15th February 1951, a LEO diary note read: ‘It can be said that on this day, LEO performed its first programme before HRH Princess Elizabeth.’

On this day 15th of February 1951 Princess Elizabeth visited Cadby hall and was give a demonstration of the Lyons Electronic Office

LEO I was still under development at that time but later in 1951 LEO ran its first programme.

The Society Secretary wrote to the Queen earlier and received this reply a few days ago.

Ernest Lenaerts who was one of the designers of LEO I kept a detailed diary with technical notes and recordings of events left the following entry in his record of 16 February 1951
16-2-51 
HRH was no more and no less impressed than I had expected. The information printed by the Teleprinter was unintelligible except of course for the message printed at the bottom which provided some light relief. Fortunately LEO made few mistakes – obviously not subject to stage fright and the Demo went off smoothly. A little more interest was shown I think in the interior of the machine when she saw the complexity of the circuits – how many of this machines like these in existence?
Only one other in working condition – No others on commercial clerical problems. This auspicious occasion called for an enormous improve in general tidyness of the lab and I must make an effort to preserve this. My own desk was clear for the occasion – the first time in months. Work on the machine can go ahead again and I have been given a more or less free hand to proceed on which problem I deem the best tackled first. The object will be to bring the machine  to full operating condition as soon as possible so that Caminer & Co can get [[weaving]] on some of the programmes that they have kept up their sleeves for so long. The first and most obvious fault to be cleared is the corruption in the Teleprinter which I Think are due to breakthro in the output Unit. Other troubles to be cleared are occasional “1”s being added into the store. These have the effect of spoiling all of the test programmes received from Cambridge ”