El & X- Server; representa una capa bàsica sobre la qual es construeixen els diversos & GUI;, com ara el & kde;. Manipula el ratolí bàsic i l' entrada del teclat (tant des d' una màquina local com des d' una remota) i proporciona rutines gràfiques elementals per a dibuixar rectangles i d' altres figures primitives.
The & X-Server; represents a basic layer upon which the various & GUI; s like & kde; are built. It manages the basic mouse and keyboard input (from the local host as well as from remote hosts) and provides elementary graphic routines to draw rectangles and other primitives.