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X window (X.11)

X-Window is a distributed, network-transparent multitasking Windows and graphics system originally developed by the Massachusetts Institute of Technology (MIT) for communication between X-Terminal with Unix workstations as servers. It is an open and platform-independent client-server protocol that allows a Windows graphical user interface to be deployed and managed across a distributed network.

X-Windows is the basis of graphical user interfaces on Unix systems, but can also be used on other platforms. In X-Window's client-server architecture, the client communicates with the server through several layers: X server, X protocol, Xlib, X toolkit, and X client. The X Window terminal forms the server, and the clients are formed by X applications. The client is thus responsible for running the applications, whereas the server is responsible for input and output, processing, and display.

X Window Concept

X Window Concept

As X Window version 11, or X11 for short, this graphics and window protocol was supported by several manufacturers. Usually the release version is added to the name, for example X11R6 for version 6.

X11 is a network-capable system for the effective display of graphical user interfaces for Unix systems. X11 supports program exchange in client-server architectures between X clients and X servers, where the X server provides all the resources for data input and the client is the application program used to perform the computation of the data. The client and server communicate using the X protocol.

X11 relies on Windows managers to create a corresponding desktop environment such as K-Desktop-Environment, Gnome or FluxBox. X11 was developed in 1984 by the Massachusetts Institute of Technology (MIT) and licensed under MIT licenses. The current version is X11R7.5.

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Englisch: X window - X.11
Updated at: 29.12.2010
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