[GreenKeys] What does this gadget do??

[COURYHOUSE at aol.com]

Christian -     great collection on  Deaf  TTY  here -    _www.smecc.org_ 
(http://www.smecc.org)  
 
thanks  Ed Sharpe Archivist  for SMECC
 
 
In a message dated 3/30/2016 9:57:15 P.M. US Mountain Standard Time,  
captainkirk359 at gmail.com writes:

Interestingly enough --- and I think this has been mentioned on  the
mailing list before --- TTY's for the deaf and hearing impaired  were
originally actual older Teletype machines. Didn't someone here  on
Greenkeys do an entire history document on the development of  TTY/TDD
systems?

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