LEO Archive of Lenaerts Notebooks

This is a temporary archive of the notebooks written by Ernest Lenaerts relating to his work on the LEO computers between 1950 and the 1960s. Each .zip file contains scanned images of one of the notebooks, between 90 and 95 images depending on the number of pages in each book.

Images were scanned at 100dpi which seems to produce a decent image. Any difficulties reading the text can be blamed on Lenaerts's handwriting!

Note: number of pages in books vary, early ones produced 95 images, later ones went to 79 images, and there were minor variations. Also, many of the notebooks had been used from both ends, so the last few images are often upside-down!

• Notebook number 3, July 1950 - October 19950
• Notebook number 4, October 19950 - January 1951
• Notebook number 5, January 1951 - March 1951
• Notebook number 6, March 1951 - May 1951
• Notebook number 7, May 1951 - October 1951
• Notebook number 8, October 1951 - January 1952
• Notebook number 9, February 1952 - May 1952
• Notebook number 10, May 1952 - September 1952
• Notebook number 11, September 1952 - November 1952
• Notebook number 12, November 1952 - January 1953
• Notebook number 13, January 1953 - March 1953
• Notebook number 14, March 1953 - July 1953
• Notebook number 15, July 1953 - August 1953
• Notebook number 16, August 1953 - November 1953
• Notebook number 17, November 1953 - April 1954
• Notebook number 18, April 1954 - October 1954
• Notebook number 19, October 1954 - March 1955
• Notebook number 20, March 1955 - October 1955
• Notebook number 21, October 1955 - January 1956
• Notebook number 22, January 1956 - May 1956
• Notebook number 23, May 1956 - September 1956
• Notebook number 24, September 1956 - January 1957
• Notebook number 25, January 1957 - May 1957
• Notebook number 26, June 1957 - November 1957
• Notebook number 27, December 1957 - April 1958
• Notebook number 28, April 1958 - August 1958 (slim volume)
• Notebook number 29, August 1958 - May 1959
• Notebook number 30, May 1959 - October 1959
• Notebook number 31, October 1959 - February 1960
• Notebook number 32, February 1960 - November 1960
• Notebook number 32a, American Trip, June 1961 - July 1961
• Notebook number 33, November 1960 - August 1961
• Notebook number 34, August 1961 - January 1962
• Notebook number 35, January 1962 - April 1962
• Notebook number 36, April 1962 - July 1962
• Notebook number 37, July 1962 - October 1962
• Notebook number 38, October 1962 - March 1963
• Notebook number 39, March 1963 - July 1963
• Notebook number 40, July 1963 - December 1963
• Notebook number 41, January 1964 - April 1964
• Notebook number 42, April 1964 - September 1964
• Notebook number 43, September 1964 - January 1965
• Notebook number 44, January 1965 - July 1965
• Notebook number 45, July 1965 - November 1965
• Notebook number 46, November 1965 - February 1966
• Notebook number 47, February 1966 - September 1966
• Notebook number 48, September 1966 - January 1967
• Notebook number 49, January 1967 - June 1967
• Notebook number 50, June 1967 - December 1967

All notebooks are now complete.

Please let me know if you find any images that are faulty and I will rescan as needed.

Bill

Last update 11th March, 2013