Zoomable map of the open source Linux operating system kernel.  Designed by Constantine Shulyupin.

The Linux Kernel is one of the most complex open source projects. There are a lot of books, however it is still a difficult subject to comprehend. The Interactive map of Linux Kernel gives you a top-down view of the Kernel.

You can see most important layers, functionalities, modules, functions and calls. You can zoom in and drag around to see details. Each item on the map is a hypertext link to source code or documentation.

Thanks to Tobias for sending in the link!