Microsoft Windows celebrated 30th anniversary few days ago as Windows 1.0 was launched on 20 November 1985. Upon its debut, this operating system aimed at the general public had a new graphic interface which was relatively easy to use. It was the first foundation stone in the immense Windows edifice to come. Initially known as Interface Manager, this new operating system was in the end called Windows.
In 30 years, Windows has changed massively and its latest version, Windows 10, which launched this summer. To get the idea how much it has Windows has changed, look at the examples at Microsoft Windows 1.0 to Windows 10: 11 shades of Windows on its 30th anniversary article and 30th Anniversary of Microsoft Windows video.