By Letter: Non-alphabet | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
  Email this page to a friend

X Window System

<operating system, graphics> A specification for device-independent windowing operations on bitmap display devices, developed initially by MIT's Project Athena and now a de facto standard supported by the X Consortium.

X was named after an earlier window system called "W".

It is a window system called "X", not a system called "X Windows".

X uses a client-server protocol, the X protocol.

The server is the computer or X terminal with the screen, keyboard, mouse and server program and the clients are application programs.

Clients may run on the same computer as the server or on a different computer, communicating over Ethernet via TCP/IP protocols.

This is confusing because X clients often run on what people usually think of as their server (e.g. a file server) but in X, it is the screen and keyboard etc. which is being "served out" to the applications.

X is used on many Unix systems.

It has also been described as over-sized, over-featured, over-engineered and incredibly over-complicated.

X11R6 (version 11, release 6) was released in May 1994.

Home (

See also Andrew project, PEX, VNC, XFree86.

Usenet newsgroups:, news:comp.x,,,, news:comp.sources.x,,

< Previous Terms Terms Containing X Window System Next Terms >
Adaptable User Interface
Andrew Toolkit

Web Standards & Support:

Link to and support Powered by LoadedWeb Web Hosting
Valid XHTML 1.0!Valid CSS! FireFox Extensions