The National Museum of Computing

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The National Museum of Computing
Tnmocsign.jpg
The National Museum of Computing
Established2007
Location Bletchley Park, UK
SatNav MK3 6DS
Coordinates 51°59′55″N0°44′37″W / 51.9985°N 0.7435°W / 51.9985; -0.7435
AccreditationNationally-styled museum by Arts Council England
Public transit accessBletchley Train Station
Website tnmoc.org

The National Museum of Computing is a UK-based museum that is dedicated to collecting and restoring historic computer systems, and is home to the world's largest collection of working historic computers. [1] The museum is located on Bletchley Park in Milton Keynes, Buckinghamshire. [2] It opened in 2007 [3] in Block H – the first purpose-built computer centre in the world, having housed six of the ten Colossus computers that were in use at the end of World War II.

Contents

As well as first generation computers including the original Harwell Dekatron computer – the world's oldest working digital computer [4] – Mainframe computers of the 1950s, 60s and 70s, the Museum houses an extensive collection of personal computers and a classroom full of BBC Micros. It is available for corporate, group, school, and individual visitors.

Although located on the Bletchley Park 'campus', The National Museum of Computing is an entirely separate registered charity [5] with its own admission fee. It receives no public funding and relies on ticket sales and the generosity of donors and supporters. The museum has its own cafe and gift shop. In 2024 it was awarded full accreditation as a Nationally-styled museum by Arts Council England.

Origins

The Bletchley Park estate was threatened with demolition and redevelopment in the late 1980s and early 1990s. It was saved in 1993 thanks to the efforts of the Bletchley Park Trust (BPT), which had been established in the previous year. [6] One leading member – and secretary to the Trust – was a scientist with electronics and computer engineering skills named Tony Sale (1931–2011). He had worked for MI5 and later at the Science Museum alongside Doron Swade on a series of projects to restore some of the Science Museum's computer holdings to working order. [7] Sale became the first curator of the Bletchley Park Museum, which in its early days was supplemented by more than a score of collections varying from WWII memorabilia to model railways. One of these centred around the history of computing and contained many historic computers, several of which were maintained in working order by enthusiastic volunteers, many of whom were members of the Computer Conservation Society. [8]

In 1993, Tony Sale and a group of volunteers started to rebuild a Colossus (a 'rebuild' as it contains parts from an original) in Block H. By June 1996 they had a prototype machine working, which was formally switched on by the Duke of Kent in the presence of Tommy Flowers who built the wartime Colossi. [9] When in 2004 Block H came under threat of demolition, Sale and colleagues were able to protect it by obtaining Grade II listed building status for it. [10] This led to the detachment of the computing collection from the Bletchley Park Trust museum, and the establishment in 2005 of the Codes and Ciphers Heritage Trust, which became the National Museum of Computing in 2007. Between 1994 and 2007 a group of volunteers led by John Harper built a working replica of a Turing-Welchman Bombe (used to help decipher Enigma–coded messages) in the BPT museum. This was relocated to Block H in 2018.

Exhibits

The exhibits on display in the museum represent only a fraction of the collection, but are chosen to tell the story of computing developments in Britain. There are a number of galleries which can be visited in a broadly chronological sequence, starting with the working replicas of WWII machines that were developed and used by Bletchley Park codebreakers.

Rebuilt Bombe RebuiltBombeFrontView.jpg
Rebuilt Bombe

This gallery tells the story of Cryptanalysis of the Enigma. Enigma machines were used by the Germans before and during WWII for sending secret messages. Alan Turing further developed, and Gordon Welchman enhanced, an idea implemented by Polish codebreakers, of a machine to assist in decrypting Enigma messages. [11] This gallery houses a fully working replica of a Bombe machine, a working replica Enigma and various related artefacts.

The replica Bombe was built by a team led by John Harper following the release in 1995 to the Bletchley Park Trust of some 2,000 BTM documents and drawings relating to the Bombes that they had built during the war. [12] The replica is owned and managed by the Turing-Welchman Bombe Rebuild Trust, which provides and trains the volunteers who run and demonstrate the machine to visitors on a regular basis. [13]

Tunny and Colossus galleries

Lorenz SZ42 cipher machine LorenzSZ42at TNMOC.jpg
Lorenz SZ42 cipher machine
Tony Sale supervising the breaking of an enciphered message using the completed Colossus rebuild. ColossusRebuild 11.jpg
Tony Sale supervising the breaking of an enciphered message using the completed Colossus rebuild.

Separate from the Enigma story is the less well-known endeavour of the diagnosing and deciphering of messages produced by the more secure 12-rotor Lorenz SZ teleprinter cipher attachments, which is told in these two galleries. [14] The Tunny galley exhibits one of the very few Lorenz SZ42 machines still in existence — something that nobody in the Allied side saw until after Nazi Field Marshal Albert Kesselring surrendered in May 1945, shortly before VE-day.

'Tunny' was the name given to the messages, to the unseen cipher machine and to the British-built emulator of it. The gallery contains a reproduction of part of the original Lorenz listening station at Knockholt in Kent, with its multiple RCA AR-88 radio receivers, [15] pen recorders (undulators) and the sort of paper tape and teleprinter equipment that was used to record the messages and transmit them to Bletchley Park. Also on display is a working replica of a British Tunny machine that exactly emulated the Lorenz machine and a working replica of the Heath Robinson machine, the forerunner of Colossus.

The Colossus gallery houses the fully working rebuild of a Colossus Mark 2. During his work to save Bletchley Park, Tony Sale recognised the pioneering nature of the ten Colossus machines that had been designed and built during WWII to assist in breaking messages enciphered by the Lorenz machines. [16] He and his team spent 14 years from 1993 in building this machine. [17] With its 2,420 valves (vacuum tubes) and its programmability by switches and patch leads, it is a reproduction of what is arguably the world’s first large-scale, programmable electronic computer.

There are a number of related artefacts in this gallery.

This gallery continues the story of valve or tube-based computers and exhibits three large machines and many other related items. The three unique large machines are:

The original EDSAC (Electronic Delay Storage Automatic Calculator) was constructed by the Cambridge University Mathematical Laboratory under Sir Maurice Wilkes. [19] Wilkes had read John von Neumann's seminal paper First Draft of a Report on the EDVAC and attended the Moore School Lectures in Summer 1946. Starting in 1947, he designed and built the machine to serve a user community from many different departments of the university. The EDSAC ran its first programs on 6 May 1949 and is therefore claimed to be be the first practical general-purpose stored-program electronic computer.
The vast increase in computing power that EDSAC and its successor EDSAC 2 supplied, contributed to the winning of three Nobel Prizes – John Kendrew and Max Perutz (Chemistry, 1962) for the discovery of the structure of myoglobin, Andrew Huxley (Medicine, 1963) for quantitative analysis of excitation and conduction in nerves and Martin Ryle (Physics, 1974) for the development of aperture synthesis in radio astronomy. All acknowledged EDSAC in their Nobel Prize speeches. [20]
Harwell dekatron WITCH computer under resotoration in 2010 Harwell-dekatron-witch-computer-under-resotoration-2010-03-13.jpg
Harwell dekatron WITCH computer under resotoration in 2010
It was used at AEA Harwell until 1957, when a competition was held for colleges to see who could make best use of it. The competition was won by Wolverhampton and Staffordshire Technical College (later becoming Wolverhampton University) and they gave it its second name of the WITCH (Wolverhampton Instrument for Teaching Computation from Harwell). The WITCH was used in computer education for over 15 years until 1973.
For a while the machine was on display at Birmingham Museum of Science and Industry, following which it was disassembled and put into storage at Birmingham City Council Museums’ Collection Centre. In 2009 the machine was spotted by TNMOC volunteers who recognised what it was, and made a plan to bring it to TNMOC for restoration in full public view. This was completed in 2012. [23]
HEC was based on an original design by Andrew Booth of Birkbeck College, London University. [25] His design for a small scientific computer was adapted by Raymond Bird at BTM in 1951 to become a prototype commercial computer designed to work with the punched card equipment familiar to BTM's customers. The first production machine was delivered early in 1955, and the subsequent 1200 series of computers were highly successful.

The HEC and EDSAC had a huge bearing on the development of computing in the UK. In particular, EDSAC led directly to LEO, the world’s first computer to run a business. The WITCH had less influence on the development of computers but in the 1960s and 1970s, and again now, is a great educational tool.

Among the smaller items are several from the productive partnership between the Victoria University of Manchester and the electrical engineering company Ferranti. These include:

This gallery contains many machines of the 1960s, -70s and -80s and one or two from the 1990s. Many machines are in working order and include:

TAC control desk Marconi Transistorised Automatic Computer control desk.JPG
TAC control desk
IBM 1130 IBM 1130 (1).jpg
IBM 1130
As well as being used in small to medium sized offices, it was marketed to price-sensitive, computing-intensive technical markets, like engineering and education, where colleges and universities used them for in both scientific and 'office' roles. [36]
The machine at TNMOC is on long term loan from Liverpool University who purchased it in 1968. After a period of non-academic use it was transferred to the Nuclear Physics Department around 1982 where it was used to digitise bubble chamber trace photos produced at CERN. Before it arrived at the museum, it had been in storage for over 25 years.
ICL 2966 ICL 2966.TNMOC.jpg
ICL 2966
The museum's 2966 was donated by Tarmac who used it as a 1900, until it was decommissioned in 1999, due in part, to fears that it would be affected by the ′Millennium Bug′. Almost all large mainframes were broken up for scrap when they reached the end of their working lives, but Tony Sale, one of the founders of the Computer Conservation Society (CCS), who was directing the Colossus Rebuild, managed to persuade ICL to pay for its transport to Bletchley Park.
Nearly ten years passed before The National Museum of Computing was formed and the system was taken out of storage and set up in the this gallery in 2008. Unfortunately the damp conditions in the semi-derelict buildings that the machine lived in for so many years took their toll. The long and difficult process of restoring the system to working order has been underway since its relocation. The magnetic disc units for these machines require specially filtered and temperature-controlled air which is not available in the 1944-vintage Block H building. Instead, a solid-state device that acts as a virtual disc system was built. The configuration from Tarmac did not include any video terminals, but three original ICL terminals were acquired and restored. The machine is run as a 1900 under the George 3 operating system. Visitors can now use the terminals to play noughts and crosses against the computer, and to explore the twisty windy passages of the classic Colossal Cave adventure game. [38]

This small gallery is used for a variety short-term exhibitions. These have included:

This gallery exhibits a variety of items including: [39]

This gallery exhibits many of the familiar home and business computers of the 1980s and 1990s. [40] Visitors can play some of the popular home computer games of the time as well. On show are, amongst others:

Exhibition space

Various substantial exhibitions reside here for periods of months or years.

This gallery covers a wide range of systems that were used in some way to simulate a reality. These include:

Innovation Hub and BBC classroom

These are two adjacent and interconnected education areas. The Innovation Hub was equipped by Fujitsu as part of its Education Ambassador Programme. It contains an array of Fujitsu technology including tablets, hybrid devices, laptops and desktop PCs.

Next door is the BBC Classroom which contains a large set of working vintage BBC Micro computers. This machine was the winning design for the BBC’s Computer Literacy Project [42] and was first demonstrated by Acorn Computers in 1981. The resulting series of computers became a mainstay of British schools in the 1980s. More than 1.5 million were sold, and their rugged design ensured that they survived the school environment. This classroom is used for workshops, activities and talks for a wide range of groups including school and academic groups, families and special interest groups.

This gallery was sponsored by the UK's National Physical Laboratory. [43] It tells the story of how, in 1965, Donald Davies, a member of the team there responsible for building Alan Turing's Automatic Computing Engine (ACE) thought of the idea of a network of interconnected data terminals to access time-shared computers. [44] Rather than a large number of lines, each carrying only a small amount of data, his conception was for the data to be broken up into short messages in a fixed format, which he named ′packets′, with computer 'nodes' running software to switch the packets at high-speeds between physical circuits. [45] This concept of packet switching was first presented in public in the US at the inaugural ACM symposium in Gatlinburg, 1967, and in the UK at the IFIP Congress, 1968, in Edinburgh. [46] Davies' design of data communication for computer networks was adopted by ARPA, a research agency of the US Department of Defense and incorporated into its design of ARPANET, the forerunner of the Internet. [47] ARPANET's first link was established between the University of California and Stanford Research Institute in November 1969, by which time the NPL's packet-switched network was already operational. [48] [49]

Opening

The Museum is open to the public 4 days a week: Tuesdays, Thursdays, Saturdays, and Sundays. The Museum operates seasonal opening hours, and is accessible from 10:30am to 4:30pm during the winter period, extending to 5pm during the summer months. Guided tours operate at 2pm on Tuesdays and Thursdays. Booking for tours is recommended as there are limited places.

There is a modest admission charge to help cover overheads, with concession rates available for students, over 60s, and children (under 5s free). The Museum now offers annual tickets, offering unlimited return visits for 365 days.

Demonstrations and talks in the Bombe, Tunny, and Colossus galleries usually occur on the hour, with slight changes depending on the number of visitors.

Funding

TNMOC entirely depends on voluntary and corporate donations and admission charges. Fund-raising continues and donors have included Bletchley Park Capital Partners, Fujitsu, Google UK, CreateOnline, Ceravision, Insight software, [50] PGP Corporation, IBM, NPL, HP Labs, British Computer Society (BCS), Black Marble, and the School of Computer Science at the University of Hertfordshire.

The museum conducted a crowdfunding campaign in March 2018 to raise funds to build a new gallery for the Bombe. [51] The campaign raised over £43,000 via crowd-funding and an additional £20,000 via direct donations.

See also

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References

  1. ↑ "The National Museum of Computing", tnmoc.org
  2. ↑ "The National Museum of Computing". Computer Conservation Society. Retrieved 10 June 2024.
  3. ↑ UK computer history gets new home, BBC News, 11 July 2007
  4. ↑ "Oldest working digital computer". Guinness World Records. Retrieved 11 June 2024.
  5. ↑ "The National Museum of Computing, registered charity no. 1109874". Charity Commission for England and Wales.
  6. ↑ "Preserving Bletchley Park". Bletchley Park Trust. Retrieved 16 June 2024.
  7. ↑ Campbell-Kelly, Martin (31 August 2011). "Tony Sale obituary: Computer scientist behind the rebuilding of the wartime code-breaking Colossus". The Guardian. Retrieved 14 June 2024.
  8. ↑ Enever, Ted (1994). Britain's Best Kept Secret: Ultra's base at Bletchley Park. Sutton Publishing. ISBN   978-0-7509-2355-2.
  9. ↑ Sale, Tony (2004). Colossus 1943-1996. Cleobury Mortimer: M & M Baldwin. ISBN   0 947712 36 4.
  10. ↑ "H Block at Bletchley Park". National Heritage List for England. Historic England. 17 December 2004. Retrieved 14 June 2024.
  11. ↑ Welchman, Gordon (1984) [1982], The Hut Six story: Breaking the Enigma codes, Harmondsworth, England: Penguin Books, ISBN   0-14-00-5305-0
  12. ↑ "The Turing Bombe: The History of the Rebuild Project". 2024. Retrieved 13 September 2024.
  13. ↑ Harper, John (2020). "The Turing Welchman Bombe Rebuild Project" . Retrieved 16 August 2024.
  14. ↑ Copeland, B. Jack, ed. (2006), Colossus: The Secrets of Bletchley Park's Codebreaking Computers, Oxford: Oxford University Press, pp. 1–6, ISBN   978-0-19-284055-4
  15. ↑ "Military Comms: WWII Military Receiver RCA AR88". The Museum of Technology, The Great War and WWII. 2007. Retrieved 13 September 2024.
  16. ↑ Sale, Tony (2004) [1998], The Colossus Computer 1943–1996 and how it helped to break the German Lorenz cipher in WWII, Cleobury Mortimer: M & M Baldwin, ISBN   0-947712-36-4
  17. ↑ Colossus – The Rebuild Story, The National Museum of Computing, archived from the original on 18 April 2015, retrieved 13 May 2017
  18. ↑ "EDSAC - Electronic Delay Storage Automatic Calculator". The National Museum of Computing. Retrieved 16 August 2024.
  19. ↑ Wilkes, W. V.; Renwick, W. (1950). "The EDSAC (Electronic delay storage automatic calculator)". Math. Comp. 4 (30): 61–65. doi: 10.1090/s0025-5718-1950-0037589-7 .
  20. ↑ Goddard, Jonathan (3 May 2019). "70 years since the first computer designed for practical everyday use". University of Cambridge: Department of Computer Science and Technology. Retrieved 13 September 2024.
  21. ↑ Howlett, John ‘Jack’ (1979). "Computing at Harwell: 25 years of Theoretical Physics at Harwell: 1954–1979" . Retrieved 30 May 2009.
  22. ↑ "Oldest working digital computer". Guiness World Records. 2012. Retrieved 16 August 2024.
  23. ↑ Ward, Michael ‘Mike’ (19 November 2012). "Technology Correspondent". News. UK: BBC. Retrieved 20 November 2012.
  24. ↑ Murrell, Kevin (2016). Adapt and Survive: A Lesson from History in Positioning in the Computing Industry. The National Museum of Computing. ISBN   978-0956795649.
  25. ↑ Bird, Raymond 'Dickie' (Summer 1999), "BTM's First Steps into Computing", Resurrection: The Bulletin of the Computer Conservation Society, 22, ISSN   0958-7403
  26. ↑ Enticknap, Nicholas (Summer 1998), "Computing's Golden Jubilee", Resurrection (20), The Computer Conservation Society, ISSN   0958-7403, archived from the original on 9 January 2012, retrieved 19 April 2008
  27. ↑ Lavington, Simon (1980), Early British Computers, Manchester University Press, p. 34, ISBN   0-7190-0803-4
  28. ↑ Hartley-Smith, Alan. "TAC and PANIC" . Retrieved 3 September 2024.
  29. ↑ Welbourne, D. (1 January 1968). "Alarm analysis and display at Wylfa nuclear power station". Institution of Engineering and Technology (IET). Retrieved 3 September 2024.
  30. ↑ Lavington, Simon (19 May 2011). Moving Targets: Elliott-Automation and the Dawn of the Computer Age in Britain, 1947–67. Springer Science & Business Media. p. 662. ISBN   9781848829336.
  31. ↑ Johnstone, Adrian (Spring 1991). "The Young person's Guide to... The Elliott 803B". Resurrection (Bulletin of the Computer Conservation Society). 1 (3). ISSN   0958-7403 . Retrieved 3 September 2024.
  32. ↑ "Elliott 903". Centre for Computing History. Retrieved 3 September 2024.
  33. ↑ Francis, C.G. (11 February 1965). "IBM introduces powerful small computer". Director of Information (Press release). White Plains, New York: International Business Machines (IBM). Archived from the original on 5 July 2019.
  34. ↑ Utley, Brian (January 2005). "Guest speaker: Brian Utley" (MP3) (Interview). Retrieved 2 January 2012.
  35. ↑ Francis, C. G. (11 February 1965). "IBM Introduces Powerful Small Computer with Monthly Rental Beginning at $695" . Retrieved 3 September 2024.
  36. ↑ "IBM 1130 Computing System". technikum29. Retrieved 10 September 2024.
  37. ↑ Buckle, J. K. (1978). The ICL 2900 Series. Macmillan computer science series. Macmillan. ISBN   9780333219171.
  38. ↑ "ICL 2966" . Retrieved 10 September 2024.
  39. ↑ "Software". TNMOC. Retrieved 11 September 2024.
  40. ↑ "PC Gallery". TNMOC. Retrieved 11 September 2024.
  41. ↑ "Dexodus" . Retrieved 12 September 2024.
  42. ↑ "BBC Computer Literacy Project 1980-1989". BBC Rewind. Retrieved 12 September 2024.
  43. ↑ "Technology of the Internet". The National Museum of Computing. Retrieved 31 January 2020.
  44. ↑ Pelkey, James L. (27 May 1988). "Interview of Donald Davies" (PDF).
  45. ↑ Davies, D. W. (1966). "Proposal for a Digital Communication Network" (PDF). all users of the network will provide themselves with some kind of error control ... Computer developments in the distant future might result in one type of network being able to carry speech and digital messages efficiently.
  46. ↑ Hempstead, C.; Worthington, W., eds. (2005). Encyclopedia of 20th-Century Technology. Vol. 1, A–L. Routledge. p. 574. ISBN   9781135455514. It was a seminal meeting as the NPL proposal illustrated how the communications for such a resource-sharing computer network could be realized.
  47. ↑ Yates, David M. (1997). Turing's Legacy: A History of Computing at the National Physical Laboratory 1945-1995. National Museum of Science and Industry. pp. 132–4. ISBN   978-0-901805-94-2. Davies's invention of packet switching and design of computer communication networks ... were a cornerstone of the development which led to the Internet
  48. ↑ John S, Quarterman; Josiah C, Hoskins (1986). "Notable computer networks". Communications of the ACM. 29 (10): 932–971. doi: 10.1145/6617.6618 . S2CID   25341056. The first packet-switching network was implemented at the National Physical Laboratories in the United Kingdom. It was quickly followed by the ARPANET in 1969.
  49. ↑ Harris, Trevor, University of Wales (2009). Pasadeos, Yorgo (ed.). "Who is the Father of the Internet? The Case for Donald Davies". Variety in Mass Communication Research. ATINER: 123–134. ISBN   978-960-6672-46-0. Archived from the original on 2 May 2022.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  50. ↑ "Insightsoftware: Solutions, Data Sources, Products, Resources".
  51. ↑ "Turing-Welchman Bombe". The National Museum of Computing.
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