[elahd]

This isn't too surprising. Our nuclear ICBMs are managed by systems old enough to use 8" floppies.

http://arstechnica.com/information-technology/2014/04/60-min....

[Vexs]

IIRC, the reason given was security reasons. It's black box security coupled with y'know, not being able to run anything modern, like a virus. And besides, does it really need anything else?