Windows
0x3 Processes & ThreadsThe heart of every OS: what a process is and its KProcess/PCB and EProcess structures in memory on the doubly-linked list, threads versus processes and the three thread states, the 32-bit virtual address space's 2GB split, virtual-to-physical translation, and synchronization via mutexes.
0x3 Windows Architecture & PE FormatHow Windows is architected, and how it loads and runs programs.