A task bar is a graphic tool bar used in most Windows applications (such as Windows 2000) to select, through the mouse, one of a number of active or open applications and programs. (The tool bar within a graphical user interface (GUI) is a row, column, or block of on-screen buttons or icons. When these buttons or icons are clicked on with the mouse, certain functions of the application are activated. The task bar is just one type of tool bar.) The task bar usually consists of a row of buttons or graphical controls on a computer screen, and is normally a bar that is located at the bottom of the Windows's desktop. However, the task bar can be moved to any of the four corners of the screen and adjusted in size. The task bar can also be set to disappear or reappear when so...