This is a data race, a video that shows change in data over time, usually over many years. In this case, we’re looking at market share of operating systems from 2009 (when iOS was a baby) through today.

The big players to keep an eye on are Windows, Android, iOS, and macOS. Obviously, there’s a lot of overlap between all of these, since many (most?) people use more than one, some people use all of them.

Here’s the data source used for the video.