See the Therac Update at http://www.twurl.com/twurled_world/therac/cover.htm.
Further information on
twURLed World reports
"The Dark Side of Software - Therac 25 Software
Safety"
The engineering discipline of Software Safety seeks to
understand how life-critical software can be properly
designed and deployed. Therac 25 is a case study of fatal
consequences of system, user interface, software, and
organization failure. WWW materials provide insight into
its professional and ethical, as well as technical,
lessons. (January 1997)