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.

In computing, the X Window System (commonly: X11, or X) is a network-transparent windowing system for bitmap displays.

The X Window System, commonly referred to merely as X, is a highly configurable, cross-platform, complete and free client-server system for managing graphical user interfaces (GUIs) on single computers and on networks of computers. X is a large and complex system, with a level of complexity comparable to that of an operating system itself.

The X Window System, called X for short, is a network-based graphics window system that was developed at MIT in 1984. Several versions of X have been developed, the most recent of which is X Version 11 (X11), first released in 1987. X11 has been adopted as an industry-standard windowing system.

The X Window System (X11) is an open source, cross platform, client-server computer software system that provides a GUI in a distributed network environment. Advertisements Used primarily on Unix variants, X versions are also available for other operating systems.