Have a look at Linux kernel source from a bird's eye view. The Linux kernel is one of the most mysterious open source projects. There is a lot of documentation, however it is still a difficult subject to comprehend. The Interactive Linux kernel map is intended to help people gain an overview of the structure and interactions of the Linux Kernel. This approach is similar to classic operating system diagrams in which application and user space interfaces are at the top, hardware interfaces and drivers are at the bottom and separate functions are shown in vertical bars