<P> Windows 3.0, introduced in May 1990, shipped with a new shell called Program Manager . Based on Microsoft's work with OS / 2 Desktop Manager, Program Manager sorted program shortcuts into groups . Unlike Desktop Manager, these groups were housed in a single window, in order to show off Microsoft's new Multiple Document Interface . </P> <P> Program Manager in Windows 3.1 introduced wrappable icon titles, along with the new Startup group, which Program Manager would check on launch and start any programs contained within . Program Manager was also ported to Windows NT 3.1, and was retained through Windows NT 3.51 . </P> <P> Windows 95 introduced a new shell . The desktop became an interactive area that could contain files (including file shortcuts), folders, and special folders such as My Computer, Network Neighborhood and Recycle Bin . Windows Explorer, which replaced File Manager, opened both ordinary and special folders . The taskbar was introduced, which maintained buttons representing open windows, a digital clock, a notifications area for background processes and their notifications, and the Start button, which invoked the Start menu . The Start menu contained links to settings, recently used files and, like its predecessor Program Manager, shortcuts and program groups . </P> <P> Program Manager is also included in Windows 95 for backward compatibility, in case the user disliked the new interface . This is included with all versions of Windows up to and including Windows XP Service Pack 1 . In SP2 and SP3, PROGMAN. EXE is just an icon library, and it was completely removed from Windows Vista in 2006 . </P>

Which of the choices are not considered part of the windows shell