This is a visualization about Most Popular Operating systems (Windows) 2003 - 2020 | Most Popular OS (windows) 2003 - 2020. We have gathered data about the market share of Microsoft Windows and we have tried our best to visualize the most popular operating systems I.e the most popular OS in windows family. The market share of operating systems indirectly shows the popularity of operating systems, so we have sorted out the most popular windows operating systems by a percentage of market share that the particular operating system has. The market share of OS is equivalent to the usage of OS which means the operating system which has the highest percentage of market share is the most used OS worldwide and it is also be considered as the best operating system. Obviously the operating system (OS) which has the highest market share may be considered as the best operating system and most used OS too. Microsoft Windows, commonly referred to as Windows, is a group of several proprietary graphical operating system families, all of which are developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. Active Microsoft Windows families include Windows NT and Windows IoT; these may encompass subfamilies, e.g. Windows Server or Windows Embedded Compact (Windows CE). Defunct Microsoft Windows families include Windows 9x, Windows Mobile and Windows Phone. 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 (GUIs). Microsoft Windows came to dominate the world's personal computer (PC) market with over 90% market share, overtaking Mac OS, which had been introduced in 1984. Apple came to see Windows as an unfair encroachment on their innovation in GUI development as implemented on products such as the Lisa and Macintosh (eventually settled in court in Microsoft's favor in 1993). On PCs, Windows is still the most popular operating system. However, in 2014, Microsoft admitted losing the majority of the overall operating system market to Android, because of the massive growth in sales of Android smartphones. In 2014, the number of Windows devices sold was less than 25% that of Android devices sold. This comparison, however, may not be fully relevant, as the two operating systems traditionally target different platforms. Still, numbers for server use of Windows (that are comparable to competitors) show one third market share, similar to that for end-user use. Learn more by visiting OUR FORUM.