Correct. And a number of DEC operating systems had
card reader support. I haven?t seen them very often on DEC machines, but for example RSTS
can handle at least 026 and 029 card codes, and some vague memory says there may have been
a ?1401? table as well.
This should come as no surprise.
We often think that DEC machines were all doing cool things like
running railroads or controlling high energy physics experiments, but
a large number of PDP-11s spent their lives running plain old business
software.
--
Will