核能杀手Therac-25：治病机器与杀人软件(8)

参考资料：
1.[Threac-25], https://en.wikipedia.org/wiki/Therac-25
2.[Medical Devices : The Therac-25], Nancy Leveson
3.[ An Investigation of the Therac-25 Accidents],Leveson, Nancy G.; Turner, Clark S
4.[Fatal Dose - Radiation Deaths linked to AECL Computer Errors],http://www.ccnr.org/fatal_dose.html