I used teletypes for access to the University of Michigan's computing systems in the early 1970's, but they were on their last legs then. The low end ascii control codes, which are still around, were from the control sequences on the teletype, which effectively zeroed out the first three bits of the regular function of the key you hit after you hit the ctrl key. ctrl-M = carriage return, ctrl-J = linefeed. The fun characters were ctrl-G(bell) and ctrl-H(backspace).

Yes, I did read the earlier post. I was thinking that it was a lot easier to grep things in a flat, fixed-length record file than it would be to grep for something in the XML equivalent.

And kill bill got a serious chuckle.