The PTYCON badge is given to users, who successfully executed the command, which allows the player to enter the PTYCON mode of Telehack.
The original softwareEdit
PTYCON is coming from the old PDP-10 systems, where it served as a control layer accessing multiple jobs from a single terminal. Such tasks are being fulfilled by screen (Linux, GPL) or tmux (BSD) recent times. As the original manual explains:
PTYCON.DOC -- Changes from V4(5) to V5(7) October 1981 1.0 SUMMARY PTYCON is a pseudo-teletype (PTY) controller. It allows a user multiple job control from a single terminal. PTYCON provides the means to converse with a number of subjobs and to control the manner and times when output is received from the subjobs. PTYCON version 5(7) runs on all releases of TOPS-20. PTYCON does not depend on any other software during its execution. PTYCON is documented in the TOPS-20 User's Guide, and in the TOPS-20 Operator's Guide.
For further information about the usage of ptycon, please see it's Wikia page.