What Does X Window System Mean?
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.
Techopedia Explains X Window System
The client/server model in X system works in reverse to typical client/server model, where the client runs on the local machine and asks for services from the server. In X system, the server runs on the local machine and provides its display and services to the client programs. The client programs may be local or remotely exist over different networks, but appear transparently.
