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tty: /T-T-Y/ [UNIX], /tit'ee/ [ITS, but some UNIX people say it
   this way as well; this pronunciation is not considered to have
   sexual undertones] n. 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.