A window is an area on the screen that displays information for a specific program. This often includes the user interface GUI as well as the program content. Windows are used by most applications as well as the operating system itself. A typical window includes a title bar along the top that describes the contents of the window, followed by a toolbar that contains user interface buttons. Most of the window's remaining area is used to display the content.

Examples:

1. Web Browser windows:
   The top of a typical Web browser window contains a title bar that displays the title of the current page. Below the title is a toolbar with back and forward buttons, an address field, bookmarks, and other navigation buttons. Below the toolbar is the content of the current Web page. The bottom of the window may contain a status bar that displays the page loading status


2. Word Processing windows:
   A window used by a word processing program, such as Microsoft Word, typically includes buttons for page and text formatting, followed by a ruler that defines the document area. Below the ruler is the main page area used for entering text.


3. Operating System windows:
   Windows used by the operating system typically include navigation buttons along the top and shortcuts to folders and other locations on the left side of the window. The rest of the window is used to display icons or lists of files and folders.

Most windows can be opened, closed, resized, minimized, and moved around the screen. The close, minimize, and zoom buttons are located on the title bar (on the right side on Windows and the left side on Macs). Minimizing a window will close the contents of the window, but store a reference to it in the Taskbar (Windows) or the Dock (Mac). Closing a window will make it disappear completely (so you may be asked to save your changes first). To move a window, click on the title bar and drag the window where you want it. To resize a window, either click the Zoom button in the title bar or click the lower right-hand corner and expand or contract the window to the size you want.

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