Windows 4

Windows 4 is the second version of MS-DOS operating system produced by Microsoft. It is also part of the MS-DOS family of operating systems and was released on April 7, 1994. Derived from the Windows 3 operating system, Windows 3 is the successor to Windows 3.1 and the predecessor to Windows 3. An updated version, Windows 6x, was released to manufacturing on March 30, 1992. Windows 4's kernel was later adopted in the development of Windows 3.