I remember using the teletypes.  Three tiered keyboards
because you had to shift to use a number.

Baudot paper tape used 5 holes per row.

ASCII tapes used 7 holes per row.

(My terminology above could be colloquial to teletype
operators, not neccessarily the official definition.)

The 'Stop' bit was appropriately named because it was
occupied by an extra pin in the tape path in case the tape
broke, thereby 'Stop'ping the transmission until the tape
could be re-spliced.

Tracy Johnson
MSI Schaevitz Sensors


> -----Original Message-----
> From: Nick Demos [mailto:[log in to unmask]]
>
> > The term "baud" comes from the old "baudot" encoding which, if you
> > will permit me to bypass thorough reference checks and go
> on my aging
> > memory, was a 5 or 6 bit encoding used ages ago for datacomm (forget
> > the 300 baud, this was when 110 was the rule).  The equations change
> > a bit with reference to "bytes/sec" or more accurately "chars/sec"
> >
> FWIW, Baudot was a six bit code used for teletypes and telegrams.  One
> bit was used for control (exactly what I don't remember), so
> it is really a
> five bit
> code.  There was an up shift and a down shift character to
> handle upper and
> lower case.
>
> Nick D.
>