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Windowing system
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<p>In <a href="/facts/Computing/Kghtm9fX">computing</a>, a windowing system (or window system) is a software suite that manages separately different parts of <a href="/facts/Electronic_visual_display/fA0mUcIQ">display screens</a>. It is a type of <a href="/facts/Graphical_user_interface/wBlQFWDP">graphical user interface</a> (GUI) which implements the <a href="/facts/WIMP_(computing)/cJcV8GAA">WIMP</a> (<a href="/facts/Window_(computing)/g39X0vV3">windows</a>, <a href="/facts/Icon_(computing)/habCR8KJ">icons</a>, <a href="/facts/Menu_(computing)/zdKCgPGq">menus</a>, <a href="/facts/Pointer_(user_interface)/bGhgwPSq">pointer</a>) paradigm for a <a href="/facts/User_Interface_Toolkit/agq78L9T">user interface</a>. </p><p>Each currently running <a href="/facts/Application_software/YQuj7Kog">application</a> is assigned a usually resizable and usually rectangular surface of the display to present its GUI to the user; these windows may overlap each other, as opposed to a <a href="/facts/Tiling_interface/mJgYbl73">tiling interface</a> where they are not allowed to overlap. Usually a <a href="/facts/Window_(computing)/g39X0vV3">window decoration</a> is drawn around each window. The programming of both the window decoration and of available <a href="/facts/Graphical_widget/SuVeScB2">widgets</a> inside of the window, which are <a href="/facts/Computer_graphics/lapBE8wv">graphical elements</a> for direct user interaction, such as sliders, buttons, etc., is eased and simplified through the use of <a href="/facts/Widget_toolkit/v8wM8wwy">widget toolkits</a>. </p>