From: bbreynolds@aol.com   
      
   On Tuesday, January 5, 2016 at 12:06:03 PM UTC-5, David Lesher wrote:   
      
   >    
   > The airlines were the first folks to engage in such datasharing.   
   > There was even an unASCII protocol for such; it was ?PIDS? or   
   > such; I think it was six bits. Decades later, I saw it on a   
   > RS-232 test set and was intrigued...   
   > --    
      
   In that the original SABRE terminals were modified Selectric typewriter   
   mechanisms, the "unASCII protocol" was likely PTTC/BCD (paper tape   
   transmission code/binary coded data), which was a six-bit code which directly   
   mapped into the tilt and rotate    
   position commands for the type ball. My Specton Datascope from the late 1970s   
   can be set to capture PTTC.   
      
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