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BMJ 2000; 321 doi: (Published 12 August 2000) Cite this as: BMJ 2000;321:458
  1. Douglas Carnall (
  1. BMJ

    Almost two decades ago, the ship's crew in the science fiction television series Blake's 7 could ask questions of two computers—a testy Perspex box called Orac and a mellow ship controller, Zen (see its web fanzine on for more details). The desire to achieve such a tantalising prospect is not confined to the minds of television dramatists, and this week a …

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