Monday, November 14, 2005

Therac-25

wikipedia entry here.

Therac-25 was a radiation therapy machine produced by Atomic Energy of Canada Limited. It was involved with at least six known accidents between 1985 and 1987, in which patients were given massive overdoses of radiation, which were in some cases on the order of tens of thousands of rads. At least five patients died of the overdoses. These accidents highlighted the dangers of software control of safety-critical systems.

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