Vernor Vinge has a character who comes out of cryo and discovers that code he wrote 500 years ago is still in production. It’s just under layers and layers of abstraction. He proceeds to pwn a bunch of hardware to aid a counter-conspiracy.
"What specialty do we need the most?" "You mean that can bring us the most income? Obviously: Programmer-Archeologist."
https://en.wikipedia.org/wiki/A_Deepness_in_the_Sky#Interste...
Recently read A Fire Upon the Deep personally, and don't recall much/any mention of it there. :)