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Program Manager is the shell of Windows 3.x and Windows NT 3.x operating systems. This shell...

Program Manager is the shell of Windows 3.x and Windows NT 3.x operating systems. This shell exposed a task-oriented graphical user interface (GUI), consisting of icons (shortcuts for programs) arranged into program groups. It replaced MS-DOS Executive, a file manager, as the default Windows shell. In later versions of Microsoft Windows, starting with Windows 95 and Windows NT 4.0, Program Manager was replaced by Windows Explorer as the shell, though Windows 95 gave the user an opportunity to choose which shell they preferred during setup. For backward compatibility with old applications, Program Manager was still included in later versions of Windows. It can be accessed by executing PROGMAN.EXE from the command line or Run dialog. The file is located in the Windows directory in older versions, or the System32 directory in Windows 2000 and Windows XP. On any Windows version, it can be used as the default shell by specifying the Shell value in the registry at either HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon (per machine) or HKCU\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon (per user). Today, Program Manager has little practical use beyond compatibility with