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3 definitions found
 for TTY
From V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016) :

  TTY
         TeleTYpe
         

From The Jargon File (version 4.4.7, 29 Dec 2003) :

  tty
   /T?T?Y/, /tit'ee/, n.
  
      The latter pronunciation was primarily ITS, but some Unix people say it
      this way as well; this pronunciation is not considered to have sexual
      undertones.
  
      1. A terminal of the teletype variety, characterized by a noisy mechanical
      printer, a very limited character set, and poor print quality. Usage:
      antiquated (like the TTYs themselves). See also bit-paired keyboard.
  
      2. [especially Unix] Any terminal at all; sometimes used to refer to the
      particular terminal controlling a given job.
  
      3. [Unix] Any serial port, whether or not the device connected to it is a
      terminal; so called because under Unix such devices have names of the form
      tty*. Ambiguity between senses 2 and 3 is common but seldom bothersome.
  

From The Free On-line Dictionary of Computing (30 December 2018) :

  tty
  
      /tit'ee/ ({ITS pronunciation, but some Unix
     people say it this way as well; this pronunciation is not
     considered to have sexual undertones), /T T Y/
  
     1. teletypewriter.
  
     2. (Especially Unix) Any terminal at all; sometimes used to
     refer to the particular terminal controlling a given job (it
     is also the name of a Unix command which outputs the name of
     the current controlling terminal).
  
     3. ({Unix) Any serial port, whether or not the device
     connected to it is a terminal; so called because under Unix
     such devices have names of the form tty*.  Ambiguity between
     senses 2 and 3 is common but seldom bothersome.
  
     4. A TDD.
  
     [{Jargon File]
  
     (1995-11-23)
  

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