Linux adoption. For sure, this has been a steadily growing area, whereas Windows adoption has been steadily declining. For sure, much of the growth has come from Android smartphones and Chromebook netbooks, both namesakes of Google. Previously, Google had a very hard time encouraging more end users to run GNU/Linux, so they focused primarily on running it on their own servers.
20180619/https://en.wikipedia.org/wiki/Linux
Unfortunately, this article doesn’t have very much in the way of graphs, despite its name and purpose.
20180619/https://en.wikipedia.org/wiki/Linux_adoption