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Erschienen in:
The Navy Comes to Borehamwood Kapitel lesen Erstes Kapitel lesen

2011 | OriginalPaper | Buchkapitel

3. The Secret Digit

verfasst von : Emeritus Professor Simon Lavington

Erschienen in: Moving Targets

Verlag: Springer London

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Abstract

We describe three rather special Borehamwood digital computers in this chapter. Two of them were designed to perform tasks for the UK’s intelligence services, via GCHQ (Government Communications Headquarters). The third went to a joint British–Australian long-range missile facility in Australia, to be used in analysing data from the Woomera test range. The time frame of all three computers, from conception to delivery, covers the period 1949–1956. Internally to the Borehamwood Research Laboratory of Elliott Brothers (London) Ltd., the projects were identified by sequence numbers in the company’s list of orders.

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Vorheriges Kapitel A Glint on the Horizon
Nächstes Kapitel Analogue Expertise
Literatur
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Lavington S (April/June 2006) In the footsteps of Colossus; a description of Oedipus. IEEE Ann Hist Comput 28(2):44–55. Invaluable help with the preparation of this paper was given to the author by Tony R (especially in a letter to Simon Lavington dated 16 July 2002) and by Peter Freeman (especially in a letter to Simon Lavington dated 2 Dec 2002)
2.
Bunt JP. The 153 computer. Volume 1. Borehamwood Internal report 371(A), dated 1 Jan 1956. The diagrams are bound separately as Volume 2, report 371(B), also dated 1 Jan 1956. Volume 3, report 371(C) of the same date, contains test programs. Some amendments to report 371 were dated 30 Sept 1957. A related report by John Bunt is entitled: 153 computer maintenance handbook. Borehamwood Internal report 386, dated 1 Oct 1955
3.
Bambrough B (1951) Design proposals for D/F calculator. Borehamwood Internal report 246, dated 29 July 1951
4.
Anon (2001) Unsigned one-page typed note, attached to a letter dated 2 Oct 2001 from Gill Bennett, Chief Historian, Foreign and Commonwealth Office, to Simon Lavington. It is assumed that the source of the attached note was GCHQ
5.
John Bunt (2002) The history of the 153. Two-page typed manuscript, sent to Simon Lavington with an accompanying letter dated 13 May 2002
6.
Wakefield AJ (1954) Mathematics of the D/F calculator programme. Borehamwood Internal report 348, dated 5 Feb 1954
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Mitchell EF (1954) Internal NRDC Memo dated Sept 1954. National Archive for the History of Computing, Manchester. NRDC records Box 86/15/4
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Ray Henville (2009) E-mail to Simon Lavington 25 Feb 2008 and three-page typed manuscript plus sketch diagram, dated 24 Nov 2009
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(a) Flowers TH (July 1983) The design of Colossus. Ann Hist Comput 5(3):239–252. (b) Coombs AWM (July 1983) The making of Colossus. Ann Hist Comput 5(3):253–259. (c) Chandler WW (July 1983) The installation and maintenance of Colossus. Ann Hist Comput 5(3):260–262
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HG (Harry) Carpenter (2000–2002) Notes taken by Simon Lavington of nine lengthy ­telephone conversations with Harry Carpenter, during the period 16 May 2000–9 Dec 2002. Harry was unwilling to commit his historical anecdotes to paper but was more than happy to talk. Part way through these exchanges, in November 2001, Harry obtained clearance under the provisions of the Official Secrets Act to reveal certain details about his hardware design activities at Borehamwood
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Ralph Erskine, Philip Marks, Frode Weieud (2006) E-mail exchanges with Simon Lavington, September/Oct 2006
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Coombs AWM. An electronic digital computer. Parts 1–4, Post Office EEJ, vol. 48, July and Oct 1955 and Jan 1956, pp 114, 137 and 212, and vol. 49, Apr and July 1956, pp 18, 126. A summary of MOSAIC will be found in chapter 10 of: Lavington SH (1980) Early British computers. Manchester University Press, Manchester. ISBN: 0-7190-0803-4. Co-published by Digital Press, 1980. ISBN: 0-93237-08-8. http://​ed-thelen.​org/​comp-hist/​EarlyBritish.​html
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SLH Clarke (2008) E-mails to Simon Lavington, Mar 2008
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SLH Clarke (1993) Recollections of the Elliott 400 series. Computer Resurrection, the Bulletin of the Computer Conservation Society, Issue number 6, summer 1993, pp 15–21
27.
Peter Goddard (2008) E-mail to Simon Lavington, dated 10 Mar 2008
28.
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29.
SLH Clarke (2009) E-mail to Simon Lavington, dated 14 Oct 2009
30.
SLH Clarke (2001) conversation with Simon Lavington on 10 July 2001
31.
Don Fenna (July 2004 and May 2006) communication with David Pentecost. Don Fenna worked at WRE from 1956 to 1969 and later became Emeritus Professor of Applied Science in Medicine at the University of Alberta, Canada. See the Computer Conservation Society’s Our Computer Heritage website: http://​www.​ourcomputerherit​age.​org/​wp/​ for more WREDAC comments compiled by David Pentecost
32.
St Johnston A (1995) History of the Research Laboratories of Elliott Brothers (London) Ltd.: Andrew St. Johnston’s Contribution. Typed manuscript sent to Laurence Clarke on 31 May 1995 (eight pages)
33.
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34.
Crawley HJ (1955) Progress on the 402 at Elliott Brothers. Two-page typed NRDC internal memo dated 15 Feb 1955, addressed to Mr Hennessey and Lord Halsbury. Describes a visit made by Crawley to Borehamwood on 8 Feb (available at the National Archive for the History of Computers, NAHC file reference NRDC/86/13/8)
Metadaten
Titel
The Secret Digit
verfasst von
Emeritus Professor Simon Lavington
Copyright-Jahr
2011
Verlag
Springer London
Buch
Moving Targets

Print ISBN: 978-1-84882-932-9

Electronic ISBN: 978-1-84882-933-6

Copyright-Jahr: 2011

DOI
https://doi.org/10.1007/978-1-84882-933-6_3

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