Definition: pseudo-tty

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Source: The Free On-line Dictionary of Computing (2003-OCT-10) 

pseudo-tty

   Berkeley Unix networking device which appears to an
   application program as an ordinary terminal but which is in
   fact connected via the network to a process running on a
   different host or a windowing system.  Pseudo-ttys have a
   slave half and a control half.  The slave tty (/dev/ttyp*) is
   the device that user programs use and the control tty
   (/dev/ptyp*) is used by daemons to talk to the net.

   (1994-11-08)