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Description: Series of notebooks kept by Ernest Lenaerts detailing his work as one of the first engineers on LEO, including the initial development and installation of LEO I at Cadby Hall in the early 1950s. Lenaerts' notes appear to be the only contemporary first-hand account of the crucial first stages of the LEO computer.
The original numbering for the notebooks employed by Lenaerts has been kept. Notebooks 1 and 2 in the series have not been found, so the series begins with Notebook 3.
Covering Dates: 6 Jul 1950 - 20 Dec 1967
Provenance: Prior to the current LEO archive project, initial scans of the notebooks (100dpi in black and white) were made by Bill Purvis of the Computer Conservation Society and provided online (see http://www.billp.org/LEO/).
The Centre for Computing History has since been able to obtain the original notebooks on behalf of the LEO Computers Society, and with the kind permission of the Lenaerts family, is working to digitise and transcribe them as part of the NLHF-funded LEO archive project.
Physical Description: 49 manuscript notebooks
Copyright: Ernest Lenaerts
Archive Reference: CMLEO/EL/NB