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On February 19, 1946 Turing presented a paper to the National Physical Laboratory (NPL) Executive Committee, giving the first complete design of a stored-program computer. Unlike most other early computers, it owed nothing to EDVAC ; it was a completely independent design which was contemporaneous with EDVAC.

The ACE had a 48- Bit Word . It used Delay Line Main Memory , and contained about 7000 Vacuum Tube s. Its multiplication time was about 448 Microseconds .

Due to various difficulties, the first version of the ACE actually built was the Pilot ACE , a smaller version of Turing's original complete design. The full-scale version was constructed later, in the late 1950s ; it was working by late 1957, but was already obsolete, due to its reliance on delay-line main memory.


REFERENCES

  • B. J. Copeland (Ed.), 2005. ''Alan Turing's Automatic Computing Engine''. OUP, Oxford. ISBN 0-19-856593-3.

  • B. E. Carpenter, R. W. Doran, 1986. ''A. M. Turing's ACE Report of 1946 and Other Papers''. MIT Press, Cambridge.

  • David M. Yates, 1997. ''Turing's Legacy: A History of Computing at the National Physical Laboratory, 1945-1995''. Science Museum, London.

  • Simon H. Lavington, 1980. ''Early British Computers: The Story of Vintage Computers and The People Who Built Them''. Manchester University Press.

  • J. H. Wilkinson, 1980. ''Turing's Work at the National Physical Laboratory and the Construction of Pilot ACE, DEUCE and ACE''. In N. Metropolis, J. Howlett, G.-C. Rota, (Eds.), ''A History of Computing in the Twentieth Century'', Academic Press, New York, 1980.



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