Famous example, although the cost was much less: http://catless.ncl.ac.uk/Risks/18.74.html#subj5 http://catless.ncl.ac.uk/Risks/18.74.html#subj5 As I recall,

Famous example, although the cost was much less: http://catless.ncl.ac.uk/Risks/18.74.html#subj5 http://catless.ncl.ac.uk/Risks/18.74.html#subj5 As I recall, it was a "vanity" function that blew up, i.e. something not at all necessary for running those smelters. Ah, look here for some much more expensive ones in space exploration: https://en.wikipedia.org/wiki/List_of_software_bugs https://en.wikipedia.org/wiki/List_of_software_bugs The second YF-22 was killed by a software error. That was plenty expensive, I'm sure, then again, that's why in peacetime we build and thoroughly exercise test aircraft before starting production.