The Free On-line Dictionary of Computing (19 January 2023):

Teletype

    (tty) A trademark for a hard-copy
   teletypewriter produced by Teletype Corporation.

   (2000-04-02)


The Free On-line Dictionary of Computing (19 January 2023):

teletypewriter
teletype

    (Nearly always abbreviated to "teletype" or
   "tty") An obsolete kind of terminal, with a noisy
   mechanical printer for output, a very limited character
   set, and poor print quality.

   See also bit-paired keyboard.

   (2000-04-02)