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 PTY (pity) n. Pseudo TTY, a simulated TTY used to run a job under the
       supervision of another job. PTYCON (pity-con) n. A program which
       controls several jobs from a single terminal, with each subjob having
       its own PTY. PTYJOB (pity-job) n. The job being run on the PTY. Also a
       common general-purpose program for creating and using PTYs. This is
       DEC and SAIL terminology; the MIT equivalent is STY.