Great story! I worked at a large aerospace manufacturer who had their most important production systems (just for a single factory) running on an ancient VAX.

Great story! I worked at a large aerospace manufacturer who had their most important production systems (just for a single factory) running on an ancient VAX. It was written in the 60's and the original author's son, who was the sole person on the planet who knew anything detailed about it - he was the architect, the dev, the BA, the sysadmin and so on - was due to retire after 35 years with the company. The DR plan was similar to this - they had found a model of the same computer in a museum somewhere that still worked and they had dibs on it. In the end they shut down the factory, one of the major factors in that decision was this system. Just too hard to replace it