Introduction

Microsoft Windows is a series of graphical interface operating systems developed, marketed, and sold by Microsoft.

Microsoft introduced an operating environment named Windows on November 20, 1985 as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUI). Microsoft Windows came to dominate the world's personal computer market with over 90% market share, overtaking Mac OS, which had been introduced in 1984.

As of October 2016, the most recent versions of Windows for personal computers, mobile devices, server computers and embedded devices are respectively Windows 10, Windows Phone 10, Windows Server 2016 and Windows Embedded 8.1.

References

1. http://en.wikipedia.org/wiki/Microsoft_windows
2. http://www.microsoft.com/windows/