Windowing system for bitmap displays on UNIX-like systems
"X11" redirects here. For other uses, see X11 (disambiguation).
X Window System
twm, the default X11 window manager
Original author(s)
Project Athena
Developer(s)
X.Org Foundation
Initial release
June 1984; 39 years ago (1984-06)
Stable release
X11R7.7[1][2]
/ 6 June 2012
Operating system
Unix, Unix-like, MVS OpenVMS, DOS
Platform
Cross-platform
Predecessor
W Window System
Type
Windowing system
License
MIT License
Website
www.x.org
The X Window System (X11, or simply X) is a windowing system for bitmap displays, common on Unix-like operating systems.
X provides the basic framework for a GUI environment: drawing and moving windows on the display device and interacting with a mouse and keyboard. X does not mandate the user interface – this is handled by individual programs. As such, the visual styling of X-based environments varies greatly; different programs may present radically different interfaces.
X originated as part of Project Athena at Massachusetts Institute of Technology (MIT) in 1984.[3] The X protocol has been at version 11 (hence "X11") since September 1987. The X.Org Foundation leads the X project, with the current reference implementation, X.Org Server, available as free and open-source software under the MIT License and similar permissive licenses.
^"7.7". Retrieved 5 April 2024.
^"X11R7.x - X Window System Version 11 Release 7.x ongoing development". Retrieved 5 April 2024.
^Steiner, Jennifer G.; Geer Jr., Daniel E. (21 July 1988). "Network Services in the Athena Environment". Proceedings of the Winter 1988 Usenix Conference. CiteSeerX 10.1.1.31.8727.
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