hilpert at cs.ubc.ca
Mon Nov 26 13:46:17 CST 2007
Chuck Guzis wrote:
> On 26 Nov 2007 at 12:47, Roy J. Tellason wrote:
> > This stirs a vague recollection of an old mechanical adding machine I once
> > had, the kind that had a big rectangular array of buttons instead of just
> > a "10-key" set of numbers. I have *no* idea how it stored a number in there,
> > though.
> My recollection of this device was that a drum with cams was used to
> store a message that could then be sent later. I don't recall if
> this was an attempt to provide buffering for typeahead--it's very
> easy for a touch typist to type faster than the old TTY machines
> could send--or just a way to record a message for later sending.
What about the "Who are you" id message used on some teletype networks, so one could
confirm that you were talking to the desired recipient terminal? I believe the
ASCII control code 'ENQuiry' was originally intended for eliciting that message.
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