Microsoft Windows is a family of operating systems. We look at the history of Microsoft’s Windows operating systems (Windows OS) from 1985 to present day.

The Windows operating systems (Windows OS) are more formally called Microsoft Windows and is a family of operating systems for personal computers. Windows dominates the personal computer world, running, by some estimates, more than 90 percent of all personal computers – the remainder running Linux and Mac operating systems.

Windows provides a graphical user interface (GUI), virtual memory management, multitasking, and support for many peripheral devices. In addition to Windows OS for personal computers, Microsoft also offers operating systems for servers and personal mobile devices.