Ubuntu, the open source operating system developed by Canonical, will soon officially be thirteen years old. The platform is also in the midst of some momentous changes, including a (perhaps nominal) change in leadership and a shift in focus away from mobile and back to servers, the cloud and PCs.

In order to provide context to the current state of Ubuntu, as well as to commemorate the milestones in its past, here’s a look at the major events that have shaped the history of the world’s most popular open source operating system.