In computing, Windows Shell is the most visible aspect of the Microsoft Windows line of operating systems. The shell is the container inside of which the entire user interface is presented, including the Task bar, the Desktop, Windows Explorer, as well as many of the dialog boxes and interface controls. Originally, the word computing was synonymous with counting and calculating, and a science that deals with the original sense of computing mathematical calculations. ... Microsoft Windows is a series of operating environments and operating systems created by Microsoft for use on personal computers and servers. ... Early computers lacked operating systems. ... The user interface is the part of a system exposed to users. ... In computing, the task bar is a term for an application desktop bar which is most often used for the Windows 95 and later operating systems. ... A desktop is the horizontal surface of a desk. ... Windows Explorer running on Windows XP Windows Explorer is an application that is part of modern versions of the Microsoft Windows operating system that provides a graphical user interface for accessing the file systems. ... Dialog boxes are special windows which are used by computer programs or by the operating system to display information to the user, or to get a response if needed. ...