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Advances in I/O, Speedup, and Universality on Colossus, an Unconventional Computer

  • Benjamin Wells
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5715)

Abstract

Colossus, the first electronic digital (and very unconventional) computer, was not a stored-program general purpose computer in the modern sense, although there are printed claims to the contrary. At least one of these asserts Colossus was a Turing machine. Certainly, an appropriate Turing machine can simulate the operation of Colossus. That is hardly an argument for generality of computation. But this is: a universal Turing machine could have been implemented on a clustering of the ten Colossus machines installed at Bletchley Park, England, by the end of WWII in 1945. Along with the presentation of this result, several improvements in input, output, and speed, within the hardware capability and specification of Colossus are discussed.

Keywords

Colossus universal computation small UTM preclassical computers 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Benjamin Wells
    • 1
  1. 1.Departments of Computer Science and MathematicsUniversity of San FranciscoSan FranciscoUSA

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