The first truly successful Microsoft Windows operating system is twenty years old today; Windows 3.0 was launched on the 22nd of May 1990 and was the successor to Windows 2.1x. The Graphics User interface (technically it was not an operating system) sat on top of MS-DOS and could run applications for the operating system from within a Window and many might fondly remember that it was available on 5.25-inch high density floppy disks. More significantly, it proved to be the perfect partner for Intel's then-new range of 386 processor, which bought protected mode and extended memory capabilities to the market.