Paul Webster wrote: 
> 
> ZCZC ABC123
> RR CHICAGO MILAN
> .123
> THE QUICK BROWN FOX ...
> NNNN

This was secure text messages on original teletype TTY !  All message
began ZCZC and ended NNNN.  I did work with Airline networks and with
such a message you could halt a flight.

The ASR33 was hand me down for students. Worked on PDP-8 (12 bit words),
PDP-10 (aka DEC-10,DEC-20) 36 bit word / 18 bti address and finally
PDP-11 16bit - nice machine - knew all the op codes off by heart - could
machine code direct.


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