Lee McMahon

    Keywords: People

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Lee E. McMahon (1931-1989)

In 19XX (1960's) Lee McMahon and Bob Ryder developed the McMahon Pairing system to address the problem of severely unbalanced pairings in Swiss pairing tournaments. McMahon pairing is a special case of Swiss Pairing in which different initial scores are assigned to various players. McMahon pairing has become the default choice for amateur tournaments in Europe and America.

Biography

  • M.A., St. Louis University
  • Ph.D., Psychology, Harvard
  • 1963-1989 [ext] Bell Labs

In 1970, McMahon was a research department head at Bell Labs who realized the benefits of the new Unix operating system for text processing. He convinced the management to buy a new PDP-11 computer which became an important milestone in the Unix development.

McMahon's contributions to Unix include implementations of [ext] sed (stream editor), grep (grep regular expressions), qsort (quick sort) and comm (data networking).


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