Kathleen Hylda Valerie Booth

Quick Info

9 July 1922
Stourbridge, Worcestershire, England
29 September 2022
Sooke, Vancouver Island, Canada

Kathleen Booth was a pioneer in computer development being the first to create assembly language and, with her husband, produced the "Booth multiplier algorithm" and the first rotating storage device.


Kathleen Booth was given the name Kathleen Hylda Valerie Britten and only after her marriage in 1950 became known with the surname Booth. She was the daughter of Frederick John Britten (born on 18 October 1897 in Bromsgrove, Worcestershire, England; died 13 December 1995) and Gladys May Kitchen (born on 18 March 1897 in Sutton Coldfield, Warwickshire, England; died on 16 July 1966). Frederick Britten was a tax inspector who married Gladys Kitchen in 1921. Kathleen, the second of their three children, is the subject of this biography. Their son Mickey was born in 1931; he died in 1936.

Kathleen began her schooling in 1929 at St Paul's Convent in Sutton Coldfield. This school had been run by the Sisters of Charity since 1925. Her primary education was at this school then, in 1932, she began her secondary education at Sutton Coldfield High School, a girls' school which had been founded in 1929. After a year at Sutton Coldfield High School, Kathleen moved to West Bromwich Secondary School. Again she only spent a year at this school before entering King Edward VI's High School for Girls, Birmingham in 1934. This school, founded in 1883 on New Street, encouraged students to go from elementary school through grammar school and high school to university. When war was declared in 1939, the girls were evacuated to Pates Grammar School in Cheltenham and it was there that Kathleen completed her schooling.

On 2 October 1941, Kathleen entered Royal Holloway College, London having won a scholarship of £40 for 3 years. Her university record gives her father's address as 58 Driffold, Sutton Coldfield, Warwickshire. She studied B.Sc. Special Mathematics and, in her first year, also studied Chemistry. She said in an interview (see [25]):-
Mathematics was the subject I was best at ... a much more pleasant thing to do than studying languages, for instance.
In 1944 she was awarded a B.Sc. Special Mathematics and won the College Prize. With World War II still in progress, Britten became a junior scientific officer at the Royal Aircraft Establishment in Farnborough where she was involved in making structural tests on materials which were used in aircraft manufacture. In November 1946 she published the report Compression Tests on Dural-Celluboard Sandwich Panels on this work. The Introduction reads:-
Much interest had been shown recently in sandwich construction as practical and theoretical investigations have indicated that sandwich panels can be equally or more efficient than the more conventional stringer and corrugated panels for carrying end loads.

This report describes tests made on 56 flat Dural-Celluboard panels with birch, spruce and whitewood centres, and compares the results with those obtained from Dural-Balsa and all-metal panels.
Kathleen's daughter Amanda said that her mother [26]:-
... used to say that, in an odd way, the war did her a favour. It opened science-based jobs to women who had previously been limited to teaching.
The war ended in 1945 and in 1946 Britten left the Royal Aircraft Establishment and joined a research group working on X-ray crystallography at Birkbeck College, London. The team was led by John Desmond Bernal (1901-1971) and Andrew Donald Booth (1918-2009) who had joined in 1945 after completing a Ph.D. in crystallography at the University of Birmingham in 1944. In 1946, the year Britten joined, the research group had moved into premises supplied by the British Rubber Producers Research Association and the Association were sponsoring Andrew Booth's work on computers. This was seen as a way to improve the X-ray crystallography work where much numerical calculation was necessary. The team were part of a larger group whose efforts eventually led to the discovery of the double helix structure of DNA.

On 28 February 1947 both Kathleen Britten and Andrew Booth left Southampton on the S S Queen Elizabeth and arrived in New York on 5 March. Britten is described as a 'Research Assistant' with final destination the Institute for Advanced Study at Princeton. The length of her visit is given as six months and it was being paid for by the British Rubber Producers Research Association. It was her first visit to the United States and the passenger list gives details such as: Height: 5 Feet, 9 Inches, Hair Colour: Brown, Eye Colour: Blue, Complexion: Fair. Andrew Booth had visited New York in the United States in 1946, returning to England in September. He gives his destination as the Rockefeller Foundation, New York, and his trip was funded by a Rockefeller Fellowship.

During their time in the United States, Britten and Booth spent time working at the Computer Project of the Institute for Advanced Study at Princeton and at the U.S. Ordnance Department. At the Institute for Advanced Study they had many very useful discussions on both the practical and the theoretical aspects of computers with both John von Neumann and Herman Goldstine [17]:-
When they arrived they found that actually very little was going on by way of computer construction but there was a lot of theory to absorb - in particular von Neumann architecture.
While at the Institute for Advanced Study, Britten and Booth co-authored the reports General considerations in the design of an all-purpose electronic digital computer (1947) and Coding for the A.R.C. (1947). You can read extracts from these reports at THIS LINK.

In June 1947 Andrew Booth made a visit to Canada, returning to the Institute for Advanced Study. They travelled back to England on different ships, Britten arriving back in Southampton on the S S Queen Elizabeth on 8 September 1947 while Booth arrived in Liverpool on 12 September 1947 on the Cunard White Star ship Media. In November 1947 they submitted the joint paper Principles and progress in the construction of high-speed digital computers to the Quarterly Journal for Mechanics and Applied Mathematics. The paper was revised in July 1948 and published in 1949.

On 1 October 1947 Andrew Booth and Kathleen Britten submitted the paper The accuracy of atomic co-ordinates derived from Fourier series in X-ray crystallography. V to the Royal Society. This paper continued work that Andrew Booth had been undertaking but developing it further with mathematical skills from Britten. The Abstract of the paper reads:-
In the first paper of this series [by Andrew Booth], the effect of experimental errors in the Fourier coefficients, upon the derived atomic co-ordinates was investigated. The assumption was made that the probable errors were independent of the magnitudes of their parent Bragg reflexions.

It has been suggested that a more accurate assumption would be to take the probable error of any coefficient as being proportional to the magnitude of that coefficient. The present paper develops the theory on this basis, and a solution in closed form is obtained.

The question of how the experimental error in the co-ordinates varies with the position of the atom in relation to its neighbours is also investigated, and it is shown that the variation is much smaller than that previously derived for finite summation errors.
Britten was registered to study for a Ph.D. in Applied Mathematics at King's College London and she was awarded the degree by the University of London in 1950 for her thesis Wind Tunnel Blockage. In the same year she married Andrew Booth. Kathleen spoke about these two 1950 events in an interview (see [25]):-
It meant quite hard work. No weekends off or gadding around. But I didn't mind. I was enjoying it.
Andrew and Kathleen Booth had two children: Ian J Booth, who became a physicist, and Amanda Booth (born March 1962), who became a vet.

Andrew and Kathleen were involved in the construction and programming of three computers [32]:-
The construction of their first electronic computer, called SEC (Simple Electronic Computer), was completed around 1950. Andrew wrote up the project in his MSc dissertation, which appears to make him the first computing graduate at Birkbeck and hence the Department's earliest alumnus.

The couple's best-known machine, APEC (All-Purpose Electronic Computer), was designed in 1949. In 1951, the British Tabulating Machine Company used its hardware circuits as the basis of the design of their HEC1 (Hollerith Electronic Computer) computer, which evolved directly by the end of the 1950s into the bestselling British computer, with a total of nearly 100 machines installed.
From the start, Kathleen was closely involved in the building and testing of the computers that Andrew designed. Getting these early machines to work involved a combination of testing the electronics and then checking that the programmes executed correctly.
Andrew and Kathleen Booth co-authored the book Automatic digital calculators which was published in 1953. Ewan Page writes in the review [31]:-
This book is an introduction to the design, construction, and use of automatic digital computers. In the early chapters the historical development of digital computers is described and an account given of the logical design of a computer and its main components. The engineering devices which have been or may be used for the construction of these components are discussed in more detail in Chapters 8-12. The last part of the book is devoted to an introduction to the use of machines and to the problems of coding. Some examples of programming with the two-address code of APEXC both with and without optimum coding are worked. The final chapter gives an outline of some of the less common applications of automatic computers. A classified and cross-referenced bibliography is included before name and subject indices.
For more information about this book, see THIS LINK.

The work of the Booths on Machine Translation is told in [6] where it is put into context with the contributions of others. While at the Institute for Advanced Studies in 1947 they had had discussions with Warren Weaver, Director of the Natural Sciences Division of the Rockefeller Foundation, about funding a computer in London. Weaver said [6]:-
... that the Foundation was unlikely to fund a machine at London for numerical work but that a submission indicating interest in Machine Translation would be well received. This was duly submitted and was successful.
Back in London, Kathleen Booth directed the development of suitable programs for translation. On 11 November 1955 the Birkbeck Computer Laboratory gave a public demonstration of machine translation. As far as we know this was the first ever public demonstration of text translation by computer. Kathleen Booth typed into her computer (see [26]):-
C'est un exemple d'une traduction fait par la machine à calculer installée au laboratoire de Calcul de Birkbeck College, Londres.
The computer printed out:-
This is an example of a translation made by the machine for calculation installed at the laboratory of computation of Birkbeck College, London.
Although this does not seem remarkable to us today, it was totally new in the 1950s to see a computer doing anything other than numerical calculations.

Kathleen Booth and her husband travelled to Australia to attend a week long computer conference at the Weapons Research Establishment at Salisbury, South Australia in June 1957. They returned via the United States, travelling from New York to Southampton on the Queen Mary, arriving on 27 May. On the list of passengers, Kathleen describes her occupation as 'mathematician' while her husband gives 'physicist'.

Kathleen and Andrew Booth were working in Birkbeck College's Computer Laboratory but in 1957 a Governors' Resolution converted that into a separate university department named the Department of Numerical Automation. Andrew Booth was head of the Department, which some claim to be the first department in the UK to teach computing. Kathleen Booth taught courses on programming in the Department of Numerical Automation and this led naturally to her writing a book on programming. In 1958 Kathleen Booth published the book Programming for an automatic digital calculator. She wrote in the Introduction:-
The years since the second World War have seen a remarkable change in the field of calculation brought about by the availability, in rapidly increasing numbers, of electronic computing machines has meant the emergence of the new technique of preparing calculations for these machines, usually known as programming. The process of organising a calculation can be divided into two parts - the mathematical formulation and the actual programming. The first of these may involve such things as the choice of a suitable finite difference relationship to replace the continuous processes of differentiation and integration, the representation of an analytic function by a power series and the estimation of errors involved in the calculation. The second consists of translating the results of the mathematical formulation into the language of the computing machine, its order code. Obviously the first stage of preparation may involve a considerable knowledge of mathematics but although both parts are often done by the same person - usually a mathematician - in fact the technique of programming can be acquired by anyone with a capacity for accurate detailed thinking, and a talent for solving puzzles. Moreover, it has been our experience that it is possible to train people to do useful programming in a matter of two weeks, although the acquiring of the more subtle tricks of the trade naturally takes longer.
For more information about this book, see THIS LINK.

Kathleen was working on other ideas on how to use computers [21]:-
The College Annual Report of 1958/59, in a foretaste of much more recent work, reports Dr Kathleen Booth developing a program to simulate a neural network to investigate ways in which animals recognise patterns. The following year reports a neural network for character recognition.
Kathleen and Andrew Booth did outstanding work at Birkbeck College but felt that they were not being given the credit they deserved. In particular, Andrew Booth was head of the very successful Department of Numerical Automation but was not being promoted to a professorship. In 1962 both Kathleen and Andrew Booth resigned their positions at Birkbeck College and decided to make a new life for themselves in Canada. Andrew Booth wrote [5]:-
I had made several attempts to get the University to create a permanent Chair in Computer Science and even obtained a guarantee of funds from Industrial friends to support it. It was rejected on the grounds that "It is too soon to see if computer science will have a long term existence!" It must be said however that this may have been due to the malice of another academic at another University. I learned of this much later along with evidence of his complete dishonesty.
In [19] the loss of Andrew Booth is described as a serious mistake by Birkbeck:-
In retrospect this was a massive loss to the College and, from today's perspective, totally incomprehensible given his key contributions to computer technology and his huge research output.
In Canada, both Kathleen and Andrew Booth worked at the University of Saskatchewan in Saskatoon. Kathleen was appointed as a research fellow and a lecturer. In 1965 she became director of a national project on machine translation of language. She returned to England for a conference held in Cambridge 1-9 July 1967 [1]:-
When the 2nd International Conference of Women in Engineering and Science was held in 1967, Kathleen represented Canada and undertook a survey of the attitudes towards women in engineering at the time.
Kathleen Booth delivered the paper Canadian attitudes towards the employment of women in the technical professions and it was published in the Conference Proceedings. In the paper she writes:-
The author of this article, having worked in the mathematical field for nearly twenty years in a variety of posts in England, came to Canada nearly five years ago, and for most of the time since then has been employed in a teaching and research post in the University of Saskatchewan. This is not intended to be the autobiography of a Pioneer on the Prairies, but one must remark here on the extreme friendliness and cooperation of Canadians at all levels to the newcomer which makes the process of transplantation much more agreeable than might appear.
Dave Bocking took a course given by Kathleen Booth at the University of Saskatchewan in 1971. He said [33]:-
She was really modest. She didn't say anything about her past contributions to the development of computers. It was only in later years that I came to know what achievements she and her husband had made in their careers just after the Second World War and through the 50s. They were really, really innovators, but we never knew that.
Kathleen and Andrew Booth left the University of Saskatchewan in 1972. Andrew wrote in [5]:-
By the time I left Saskatoon in 1972 I had a reasonably qualified staff and a graduate school enrolment of about 300. This was the fourth largest in Canada. On the side our work on Movable Type had continued under the supervision of Dr Kathleen Booth and our system had been demonstrated to the Queen's Printer.
In 1972 Andrew Booth was appointed as President of Lakehead University, Thunder Bay, Ontario. Kathleen Booth also left the University of Saskatchewan at this time and was appointed as an honorary Professor of Mathematics at Lakehead University. In 1978 they both retired and moved to Sooke on Vancouver Island where they set up the computer consulting business Autonetics Research Associates. Their home, Timberlane, 5317 Sooke Road, Sooke, British Columbia, was a large rural property. Kathleen remained active in her research on neural networks and, in 1993 she published the joint paper Using neural nets to identify marine mammals which she co-authored with her son Ian J Booth. Both Kathleen and Ian Booth give their address on the paper as Autonetics Research Associates, Inc., Sooke, BC, Canada. Kathleen Booth's publication topics are listed as:-
... acoustic signal processing, aquaculture, back propagation, bioacoustics, biological techniques and instruments, biology computing, feedforward neural nets, geophysics computing, oceanographic techniques, speech recognition, underwater sound, zoology.
The paper has the following Abstract:-
A software neural net model to recognise the calls of individual seals has been constructed and has been shown to perform satisfactorily with all of the mammals in the available set. It has also proved stable in the presence of both man made and natural noise. Operating and conditioning times on typical computers are provided.
Andrew Booth was 91 years old when he died in a hospital of heart and kidney failure on 29 November 2009 in Victoria. Kathleen continued to live at Sooke [25]:-
She was a keen vegetable grower, taking produce long to the annual autumn fair, and her garden had more than 60 varieties of wild flowers. Before the onset of mobility issues she and her husband enjoyed hiking and walking. She continued to follow developments in computing and 18 months ago, approaching her 99th birthday, used an iPad to record her memories.
She celebrated her 100th birthday on 9 July 2022. Shortly before, on 9 June 2022, the Andrew and Kathleen Booth Memorial Lecture was given at Birkbeck College and Kathleen sent a video message which was played after the main lecture. Birthday wishes were sent from the meeting to Kathleen. She died in September, a few weeks after her 100th birthday.

Since Kathleen and Andrew Booth worked in close cooperation for almost the whole of their careers, it is difficult to separate their achievements. One very important contribution that Kathleen made was developing assembly language. Rick Bunt said (see [5]):-
What she was doing, she was doing before there was an industry, before there was an academic field. They were really early pioneers. ... Without assembly language, I think computers would have been much less widely accepted. Assembly languages were the first way that normal people like us were able to start using computers. ... Andrew was a very outgoing figure … where Kathleen was very quiet and kind of worked in the background. So it doesn't surprise me at all that a lot of the credit for their joint accomplishments is given to Andrew. But they would admit they worked together constantly.
Together they produced the "Booth multiplier algorithm" and the first rotating storage device. Kathleen wrote many influential papers including: The Mechanical Efficiency of Pneumatic Shuttle Propulsion in Looms (1954), (with A D Booth) On magic squares (1955), (with A D Booth) Automatic digital calculators (1956), Variations in tension of an unwinding thread (1957), Statistical parsing by computer (1960), (with I A Harris) The effect of elastically reflected electrons on the characteristic of a thermionic diode (1961), (with D R Cox) Some systematic supersaturated designs (1962), An experiment in mechanical translation (1963), Machine aided translation with a post-editor (1967), (with J A Macnaughton) SASLIP, a simple list processor (1973), (with I J Booth) Using neural nets to identify marine mammals (1993), (with A D Booth) The beginnings of MT (2000), and Metalanguage (2003).

Birkbeck College has set up a [4]:-
... fully-funded PhD studentship, which recognises the contribution of pioneering computer scientist Dr Kathleen Booth, [it] is made possible with support from Google. ... Professor George Roussos, Head of the Department of Computer Science and Information Systems, said: "We are delighted to offer the Kathleen Booth Anniversary PhD Studentship in Computer Science with support from Google to celebrate Kathleen's contributions and achievements as one of the earliest women computer science pioneers. This award reaffirms our commitment to offer career development opportunities for women in a still highly gender-imbalanced discipline."
Birkbeck has run the Andrew and Kathleen Booth Memorial Lecture each year since 2015.

References (show)

  1. N C Baker, Kathleen Booth, Magnificent Women (6 May 2019).
  2. B Benjamin, Review: Programming for an automatic digital calculator, by Kathleen H V Booth, Journal of the Royal Statistical Society. Series A (General) 121 (4) (1958), 486-487.
  3. K Best, Remembering Professor Kathleen Booth, 1922-2022, Birkbeck Perspectives (Birkbeck, University of London, 6 October 2022).
  4. Birkbeck offers Kathleen Booth Anniversary PhD Scholarship to support representation in Computing, Department of Computer Science and Information Systems (Birkbeck, University of London, 4 December 2022).
  5. A D Booth, A life in science, Canadian National Committee for Crystallography Newsletter 1 (September 2009).
  6. A D Booth and K H V Booth, The beginnings of MT, in W John Hutchins (ed.), Early years in machine translation (John Benjamins Publishing Company, 2000), 253-261.
  7. J Bourke, 200 Years of Radical Learning for Working People (Oxford University Press, 2022).
  8. R A Brooker, Review: Programming for an automatic digital calculator, by Kathleen H V Booth, The Mathematical Gazette 43 (346) (1959), 306.
  9. H Bruderer, Milestones in Analog and Digital Computing (Springer, 2020).
  10. M Campbell-Kelly, The Birkbeck College Machines, The Development of Computer Programming in Britain (1945 to 1955), Annals of the History of Computing 4 (2) (1982), 121-139.
  11. M Campbell-Kelly, From Theory to Practice: The Invention of Programming, 1947-51, in C B Jones and J L Lloyd (eds.), Dependable and historic computing (Springer-Verlag, Berlin, 1998), 23-37.
  12. J W Carr III, Review: Programming for an automatic digital calculator, by Kathleen H V Booth, Mathematical Reviews MR0184369 (32 #1842).
  13. E J W D, Review: Automatic digital calculators, by Andrew D Booth and Kathleen H V Booth, Journal of the Institute of Actuaries (1886-1994) 80 (3) (1954), 430-431.
  14. K DeRosa, Canadian-based scientist helmed early computer, National Post Toronto, Ontario, Canada (11 December 2009).
  15. S Dufresne, Kathleen Booth: Assembling Early Computers While Inventing Assembly, Hackaday (21 August 2018).
  16. G Dyson, Turing's Cathedral: The Origins of the Digital Universe (Pantheon Books, 2012).
  17. S Gee, Computer Pioneer Kathleen Booth Dies At Age 100, i-programmer (30 October 2022).
  18. R Hamming, Review: Automatic digital calculators, by Andrew D Booth and Kathleen H V Booth, Mathematical Reviews MR0057639 (15,258d).
  19. Historian, Andrew Booth and the Forgotten Computers, i-programmer (7 April 2016).
  20. D A L J, Review: Programming for an automatic digital calculator, by Kathleen H V Booth, Journal of the Institute of Actuaries (1886-1994) 84 (3) (1958), 313.
  21. R Johnson, School of computer science and information systems: A short history, 50 years of Computing, UK (Birkbeck School of Computing, 2008).
  22. R G Johnson, Andrew D Booth: Britain's Other "Fourth Man", in Arthur Tatnall (ed.), History of Computing: Learning from the Past (Springer, 2010), 26-37.
  23. R G Johnson, There and back again - Andrew Booth, a British Computer Pioneer, and his Interactions with US and Other Contemporaries, in Arthur Tatnall and Christopher Leslie (eds.), International Communities of Invention and Innovation (Springer, 2016), 58-70.
  24. Kathleen Booth, Centre for Computing History (2022).
  25. Kathleen Booth: Pioneering computer scientist, mathematician and researcher at Birbeck College who wrote one of the earliest books on programming, The Times (18 October 2022).
  26. J Knox, Computer pioneer lived quietly in our midst, Times Colonist (8 November 2022).
  27. S Lavington, Alan Turing and His Contemporaries: Building the World's First Computers (BCS, The Chartered Institute for IT, 2012).
  28. J A N Lee (ed.), International Biographical Dictionary of Computer Pioneers (IEEE, 1995).
  29. L Nelson, Kathleen Booth, computer pioneer who made a major breakthrough in programming - obituary, Canada Today (25 October 2022).
  30. J Norman, Booth & Britten Write the Earliest Program Leading toward Machine Translation; and a Pioneering Description of a Stored-Program Computer, HistoryofInformation.com (20 December 2022).
  31. E S Page, Review: Automatic digital calculators, by Andrew D Booth and Kathleen H V Booth, Journal of the Royal Statistical Society. Series A (General) 116 (4) (1953), 464.
  32. M Phister, Review: Automatic digital calculators, by Andrew D Booth and Kathleen H V Booth, Science, New Series 120 (3110) (1954), 213-214.
  33. C Putnam, Remembering a USask computing pioneer, College of Arts and Science, University of Saskatchewan (6 December 2022).
  34. Rebekah, A short history of Computer Science at Birkbeck, Birkbeck Perspectives (Birkbeck, University of London, 6 October 2022).
  35. Remembering computer pioneer Kathleen Booth and WGC's ARC, Welwyn Hatfield Times (7 November 2022).
  36. J Rothstein, Review: Automatic digital calculators (2nd edition), by Andrew D Booth and Kathleen H V Booth, Science, New Series 125 (3243) (1957), 355.
  37. J Rothstein, Review: Programming for an automatic digital calculator, by Kathleen H V Booth, Science, New Series 129 (3364) (1959), 1669.
  38. C B T, Review: Programming for an automatic digital calculator, by Kathleen H V Booth, Mathematical Tables and Other Aids to Computation 13 (66) (1959), 136-138.
  39. A Tatnall (ed.), History of Computing: Learning from the Past (Springer, 2010).
  40. Telegraph Obituaries, Kathleen Booth, computer pioneer who made a major breakthrough in programming - obituary, The Telegraph (25 October 2022).
  41. D J W, Review: Automatic digital calculators, by Andrew D Booth and Kathleen H V Booth, Science Progress (1933-) 42 (167) (1954), 512.
  42. C H Wallin, Review: Automatic digital calculators (2nd edition), by Andrew D Booth and Kathleen H V Booth, Mathematical Tables and Other Aids to Computation 13 (68) (1959), 332-333.
  43. M V Wilkes, Review: Automatic digital calculators (2nd edition), by Andrew D Booth and Kathleen H V Booth, The Mathematical Gazette 41 (337) (1957), 233.

Additional Resources (show)

Other pages about Kathleen Booth:

  1. The Booth-Britten 1947 reports
  2. Kathleen Booth's books

Other websites about Kathleen Booth:

  1. MathSciNet Author profile
  2. zbMATH entry

Written by J J O'Connor and E F Robertson
Last Update February 2023