Operating system. History of operating systems, Process (computing), Interrupt, Protected mode, Ring (computer security), Memory management, Computer multitasking, Process management (computing), Context switch, Preemption (computing), Virtual file system, Device driver, Computer network, Computer security, List of operating systems, Solaris (operating system), Real- time operating system, Object- oriented operating system, Comparison of operating systems, Trusted operating system, Computer architecture, Kernel (computing), List of important publications in computer science