All here with Mike seems correct. I think that
the use of control codes was probably not a DEC
invention though, unless DEC invented the video
era (post teletype) terminal...
Which leads to this question. Anybody know who
invented the video terminal?
Impossible to answer unless you define the question much more precisely.
For example, what is a video terminal? A video tube version of a
printing terminal, with no cursor positioning? Or is it the first
cursor positioning in a stand alone terminal? etc, etc.
-Lawrence LeMay