Fun NI archeology story. When I was there in the early 2010s, I met a greybeard hardware engineer with a big chip mask poster on his cube wall. He told me they

Fun NI archeology story. When I was there in the early 2010s, I met a greybeard hardware engineer with a big chip mask poster on his cube wall. He told me they lost the schematics and all documentation to one of their first timing chips that was used in lots of products. They ended up calling the manufacturer and asking for the mask image back, and any question anyone had had to be reverse engineered from the mask.