The title is as ambiguous as it is because I guess it applies to all kinds of work. The only software of consequence I've ever written is interfacing with specialized measurement equipment in a production environment. It controls the devices, reads and evaluates the results, does some basic and some more advanced statistics, saves everything into CSV files and gives a one page text only printout. In the 25 years I developed and maintained that ol' piece of junk, several tens of millions of components were evaluated by it. Yeah, I know exactly what you mean. :)