Hint: it is not Windows. No, it isn’t Macintosh either.
According to an article by Dieter Bohn in The Verge web site, the Android operating system is installed on more computers, laptops, tablet computers, and smartphones than any other operating system in the world. In fact, it isn’t just slightly more popular than some other operating system; it is by far the dominant operating system of today.
The soaring popularity of Android is due in large part to its main platform: the smartphone. The number of smartphones sold today outnumbers sales of computers running Windows, Macintosh, and Linux. In fact, many young consumers and also people in third world countries never purchase a desktop or laptop computer; they simply use a smartphone or tablet for all their needs. And Android is installed on about 85% of all the smartphones in the world.