| 54630 The Layman's Guide to LEO, Chapter 1, David Caminer's copy |
Document |
1952 |
| 55650 Lenaerts Notebook 3 (black and white copy) |
Document |
6 Jul 1950 |
| 55876 LEO Chronicle (with 1955-61 extension) |
Document |
1961 |
| 56282 Lenaerts Notebook 4 (black and white copy) |
Document |
9 Oct 1950 |
| 64070 Photo of Ernest Lenaerts, D.W. Boston and Michael Underwood with ICL speech recognizer |
Photograph |
1969 |
| 64071 Second photo of Ernest Lenaerts, D.W. Boston and Michael Underwood with ICL speech recognizer |
Photograph |
1969 |
| 64072 Talking to The Computer - Article in New Scientist, Dec 1960 |
Document |
Dec 1969 |
| Lenaerts Notebook 3 (6 Jul - 9 Oct 1950) |
Document |
6 Jul 1950 |
| 64073 Improvements to Computer Efficiency by Attention to Human Factors, c1970-71 |
Document |
1970 |
| Lenaerts Notebook 4 (9 Oct 1950 - 26 Jan 1951) |
Document |
9 Oct 1950 |
| 63070 Raytheon Computers |
Document |
21 Dec 1950 |
| 64074 Michael Underwood 'Talking to the Computer - Postscript' |
Document |
Jun 2021 |
| Lenaerts Notebook 5 (29 Jan - 7 Mar 1951) |
Document |
29 Jan 1951 |
| Lenaerts Notebook 6 (7 Mar - 23 May 1951) |
Document |
7 Mar 1951 |
| Lenaerts Notebook 7 (25 May - 16 Oct 1951) |
Document |
25 May 1951 |
| Lenaerts Notebook 8 (18 Oct 1951 - 31 Jan 1952) |
Document |
18 Oct 1951 |
| Lenaerts Notebook 9 (1 Feb - 26 May 1952) |
Document |
1 Feb 1952 |
| 30th November 1951 - a momentous day! |
Blog Post |
16 Nov 2021 |
| A brief history of STL |
Article |
Unknown |
| Acoustic Noise in the Computer Room |
Article |
1967 |
| Anne Hills (Anne Smewing) |
Person |
Unknown |
| Automatic Square-Rooting on a Computer |
Article |
1955 |
| Ernest Lenaerts |
Person |
1910 |
| Explore our LEO Computers Collection |
Article |
Unknown |
| Jean Cox (Jean Elliott): Interview, 17 July 2017 53391 |
Media |
17 Jul 2017 |
| John Winterbottom: Memoir |
Article |
Unknown |
| Lenaerts Notebook 10 (9 May - 9 Sep 1952) |
Document |
9 May 1952 |
| LEO - Operations and Maintenance |
Article |
1954 |
| LEO: The First Business Computer |
Book |
Mar 1994 |
| Maintenance Procedures on a Computer |
Article |
Jan 1960 |
| Stan Holwill: My LEO Involvement & Memories |
Article |
Unknown |
| Stephen Evans: Memoir |
Article |
Unknown |
| Study of Static Charge on Paper Tape |
Article |
1966 |
| Talking to the Computer |
Article |
1969 |
| The Influence of the Cambridge Mathematical Laboratory on the LEO Project |
Article |
1992 |
| The Operator's Console |
Blog Post |
31 Jan 2022 |
| Visual Presentation of Binary Numbers |
Article |
1951 |
| Lenaerts Notebook 11 (10 Sep - 10 Nov 1952) |
Document |
10 Sep 1952 |
| Lenaerts Notebook 12 (12 Nov 1952 - 14 Jan 1953) |
Document |
12 Nov 1952 |
| Lenaerts Notebook 13 (15 Jan - 13 Mar 1953) |
Document |
15 Jan 1953 |
| 63079 Logical Design of EDSAC II with special reference to Micro-programming |
Document |
14 May 1952 |
| Lenaerts Notebook 14 (16 Mar - 5 Jul 1953) |
Document |
16 Mar 1953 |
| Lenaerts Notebook 15 (6 Jul - 26 Aug 1953) |
Document |
6 Jul 1953 |
| Lenaerts Notebook 16 (28 Aug - 12 Nov 1953) |
Document |
28 Aug 1953 |
| Lenaerts Notebook 17 (12 Nov 1953 - 2 Apr 1954) |
Document |
12 Nov 1953 |
| Lenaerts Notebook 18 ( 2 Apr - 19 Oct 1954) |
Document |
2 Apr 1954 |
| Lenaerts Notebook 19 (19 Oct 1954 - 25 Mar 1955) |
Document |
19 Oct 1954 |
| Lenaerts Notebook 20 (31 Mar - 2 Oct 1955) |
Document |
31 Mar 1955 |
| Lenaerts Notebook 21 (3 Oct 1955 - 25 Jan 1956) |
Document |
3 Oct 1955 |
| Lenaerts Notebook 22 (31 Jan - 1 May 1956) |
Document |
31 Jan 1956 |
| Lenaerts Notebook 23 (2 May - 12 Sep 1956) |
Document |
2 May 1956 |
| Lenaerts Notebook 24 (18 Sep 1956 - 14 Jan 1957) |
Document |
18 Sep 1956 |
| Lenaerts Notebook 25 (15 Jan - 30 May 1957) |
Document |
15 Jan 1957 |
| Lenaerts Notebook 26 (5 Jun - 7 Nov 1957) |
Document |
5 Jun 1957 |
| 63099 Progress at Cambridge, Apr-June 1955 |
Document |
19 May 1955 |
| 51860 Outside the Mathematical Lab |
Photograph |
1948 |
| 60491 Ernest Lenaerts, Ray Shaw and Ernest Kaye set up for the LEO I Demonstration |
Photograph |
8 Mar 1950 |
| 60492 Accumulator Store, LEO I Demonstration |
Photograph |
8 Mar 1950 |
| 60541 Central aisle, LEO I Demonstration |
Photograph |
Mar 1950 |
| 60495 Ernest Lenaerts looking at a LEO I teleprinter |
Photograph |
1950 |
| 60542 LEO I Build Team |
Photograph |
1950 |
| 54266 LEO I Reliability Test |
Photograph |
12 Jan 1952 |
| 60473 Derek Hemy, Ernest Lenaerts, Gordon Gibbs and Leo Fantl with LEO I |
Photograph |
Jan 1952 |
| 55586 Samastronic printer |
Photograph |
1958 |
| 67827 LEO Drinks Reception |
Photograph |
Unknown |
| 69268 LEO I Closing Down Ceremony |
Photograph |
5 Jan 1965 |
| 69417 LEO I Demo |
Photograph |
Unknown |
| 62888 Lenaerts post-war work for Lyons |
Document |
1 Sep 1944 |
| 62889 Lenaerts reporting back from Cambridge, part 1 - 1946-47 |
Document |
8 Aug 1946 |
| 62890 Lenaerts reporting back from Cambridge, part 2 - Jan-Mar 1948 |
Document |
6 Jan 1948 |
| 54870 Letter from Ernest Lenaerts to John Simmons with paper on the Half-Adder, Apr 1948 |
Document |
7 Apr 1948 |
| 62891 Lenaerts reporting back from Cambridge, part 3 - Apr-May 1948 |
Document |
7 Apr 1948 |
| 62893 Lenaerts reporting back from Cambridge, part 4 - June-Aug 1948 |
Document |
8 Jun 1948 |
| 62894 Lenaerts reporting back from Cambridge, part 5 - Sep-Nov 1948 |
Document |
1 Sep 1948 |
| 62895 Lenaerts drafts of notes/papers in preparation for preliminary work on LEO I, 1948-49 |
Document |
1948 |
| 62309 Programme for Mr Lenaerts, 8 Aug 1949 |
Document |
8 Aug 1949 |
| 62897 Lenaerts fragments: unidentified correspondence and notes |
Document |
1947 |
| 56432 H3 Discussion Groups |
Document |
24 Oct 1950 |
| 61881 View of LEO I down central aisle (c1950) |
Photograph |
1950 |
| 61859 Derek Hemy at the blackboard (1952) |
Photograph |
12 Jan 1952 |
| 61861 Gordon Gibbs, Derek Hemy and Ernest Lenaerts (1952) |
Photograph |
Jan 1952 |
| 61862 Leo Fantl and Ernest Lenaerts (1952) |
Photograph |
Jan 1952 |
| 61300 Ernest Lenaerts and Wally Dutton (c1952) |
Photograph |
1952 |
| 62896 Lenaerts report: Possible Improvements to Mercury Delay Storage, 19th Aug 1953 |
Document |
19 Aug 1953 |
| 62307 LEO I BBC Newsreel, 16 Feb 1954 |
Media |
16 Feb 1954 |
| 62900 Lenaerts: Samastronic Printer and the Lenaerts Character |
Document |
19 Feb 1962 |
| 62898 Lenaerts: Articles About LEO 1951-65, 5th Jan 1966 |
Document |
5 Jan 1966 |
| 68149 Anthony Salmon, Sir Gordon Radley, Ernest Lenaerts, John Pinkerton |
Photograph |
29 Dec 1966 |
| 68150 Ernest Lenaerts |
Photograph |
29 Dec 1966 |
| 68235 Press Office caption for Lenaerts' 40th |
Document |
29 Dec 1966 |
| 62899 Lenaerts: Revolution by Numbers, Chap 4. Hardware (draft), 30th Jul 1971 |
Document |
30 Jul 1971 |
| 67690 1984 LEO Reunion Contact Sheet A |
Photograph |
1984 |
| LEO Catalogue Update: Photographs, 7th August 2020 |
Blog Post |
7 Aug 2020 |
| LEO Catalogue Update: 18th September 2020 |
Blog Post |
18 Sep 2020 |
| LEO Catalogue Update: 22nd October 2020 |
Blog Post |
22 Oct 2020 |
| LEO Catalogue Update: 27th November 2020 |
Blog Post |
27 Nov 2020 |
| LEO Catalogue Update: 27th January 2021 |
Blog Post |
28 Jan 2021 |
| LEO Catalogue Update: 26th July 2021 |
Blog Post |
26 Jul 2021 |
| LEO Catalogue Update: 29th May 2022 |
Blog Post |
29 May 2022 |
