@clacke I wish they were still around, they were so cool. Not fun to maintain though, and hell to run in a multi-user environment. I wrote some interface stuff for a Calcomp plotter on the university VAXcluster where I worked in the 1980's. It had to take stuff off a print queue, print a user banner on the plotter before running the plot. So many times the plot went backwards over the paper and wrote all over the last user's stuff - until we mastered the management of it.