X and PEX Programming.
Spencer W. Thomas · 1990
The X window system version 11 (X11)[1] is an increasingly popular “standard” window system for bit-mapped workstation displays. It is interesting that this standard was designed and implemented by a small group of people at the Massachusetts Institute of Technology (MIT), and pioneered several new concepts; rather than being a codification of existing practice by a large committee, as are most standards. X1 owes its popularity, in part, to the free distribution of its source code, and to the fact that it runs on a wide assortment of hardware, ranging from the IBM-PC and the Apple Macintosh up to the newest, fastest, and most expensive “graphics super-workstations.” It has been adopted as the standard window system by many hardware vendors, and is available as an alternative on other systems.