X Windows is the software system written for managing windows under Unix. A graphics architecture, application programming interface (API) and prototype implementation developed by the Massachusetts I [..]

A way of operating remote systems. The window allows the user to control and application remotely and view the application's output.

X Windows forms the basis for most GUIs on UNIX. It is based upon a network protocol such that a program can run on one computer but be displayed on another. Conceptually, it is a graphical version [..]

Formally knows as the X Window System; also called X. A popular window

This is a network-based graphical user interface developed at MIT that has gained a wide degree of acceptance by a number of hardware/software vendors. Graphics are created using a distributed computing paradigm on a X Window server and distributed over a network to a variety of client X Window machines for display.