tty: /T-T-Y/ [UNIX], /tit'ee/ [ITS, but some UNIX people say it this way as well;

: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.
-- The AI Hackers Dictionary