Notebook kept by Ernest Lenaerts during his work on the LEO computer, dated 3rd October 1955 to 25th January 1956.

Includes entries:
NB21-002:  3/10/55
NB21-004:  7/10/55 [misdated as September]
NB21-005: Pictures for Trainees
NB21-006: Programme targets for Training
NB21-008: Operational Control LEO II
NB21-009: Specification for Marginal Testing LEO II
NB21-010:  14/10/55
NB21-011:  19/10/55
NB21-012:  20/10/55
NB21-015: Maintenance Section
NB21-017:  26/10/55
NB21-018: LEO Conversion Course
NB21-019:  1/11/55
NB21-026:  4/11/55
NB21-028:  6/11/55
NB21-031:  8/11/55
NB21-032: Meeting on LEO I Mod
NB21-033:  9/11/55
NB21-037:  15/11/55
NB21-041: 16/11/55. Serviceability of LEO II
NB21-044: Progress on LEO II. JRMS [John Simmons] re White
NB21-046: Mods required for stacker
NB21-052: Queries on LEO II Coord [Retrospective Note Made 24th Feb 1959]
NB21-053: C Testing
NB21-054: 24th Nov 1955
NB21-056: 25th Nov 1955
NB21-057: 26 Nov 1955. "Biggest breakdown yet on LEO I occurred Friday & Saturday"
NB21-060: 29 Nov 1955
NB21-061: Devt Stages in LEO II Assembly
NB21-062: Modification of Orders
NB21-067: 10 Dec 1955
NB21-075: TRT
NB21-076: Bull Printer
NB21-077: Assembly of Second LEO II
NB21-078: LEO Policy
NB21-079: Blood Groups LEO I
NB21-080: LEO II
NB21-081: Staff Training. Staff General
NB21-082: Other Jobs
NB21-085: 23 Jan 1956
NB21-089: Holidays Privilege
NB21-090: 26th Jan 1956


The Lenaerts notebooks are being digitised and transcribed as part of the National Lottery Heritage Funded LEO project at The Centre for Computing History.  We are indebted to our team of volunteers for scanning and transcribing the notebooks. If you would like to get involved with our work on these fascinating documents, please get in touch!

Provenance :
The notebooks are being digitised while on loan to The Centre for Computing History from the LEO Computers Society, with the kind permission of the Lenaerts family.