Xterm

xterm is the standard terminal emulator for the X Window System. A user can have many different invocations of xterm running at once on the same display, each of which provides independent input/output for the process running in it (normally the process is a Unix shell).

xterm originated prior to the X Window System. It was originally written as a stand-alone terminal emulator for the VS100 by Mark Vandevoorde, a student of Jim Gettys, in the summer of 1984, when work on X started. It rapidly became clear that it would be more useful as part of X than as a standalone program, so it was retargeted to X. As Gettys tells the story [1], "part of why xterm's internals are so horrifying is that it was originally intended that a single process be able to drive multiple VS100 displays."

After many years as part of the X reference implementation, around 1996 the main line of development then shifted to XFree86 (who forked from the version with X11R6.3) and it is presently maintained by Thomas Dickey.

Many xterm variants are also available.

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