Web Reference: The engineer had reused software from the Therac-6 and Therac-20, which used hardware interlocks that masked their software defects. Those hardware safeties had no way of reporting that they had been triggered, so preexisting errors were overlooked. Oct 3, 2025 · Between 1985 and 1987, the Therac-25 massively overdosed at least six patients. Four of them died from their injuries. The victims weren’t just statistics; they were people like Ray Cox, a... Conclusion Therac-25 is an extreme example of what can go wrong with software systems, and the devastating consequences that bugs can have on regular people. Although most of us won't work on safety-critical systems, software errors can still have a significant impact on our users.
YouTube Excerpt: In 1985, a state-of-the-art radiation therapy device called the THERAC-25 started blasting holes through patients' bodies, leading ...
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