Shorthand for the Windows 95 series, including Windows 95, 98 and Me. Win9x differs from Windows NT in that Win9x is derived from Windows 3.x and still includes large portions of MS-DOS, whereas Windows NT was designed as a modern operating system from the ground up. Most of Windows’ criticism stems from dissatisfied Win9x users; the Windows NT series suffers from few of the problems of it puny cousins.