Topics: Operating System, Computer-System Organization, Computer-System Architecture, Operating-System Operations, Operating-System Structures, Operating-System Services, user interface, operating system interface, distributed systems, kernel data structures, Operating-System Debugging, process management, process scheduling, interprocess communication, Multicore Programming, Multithreading Models, Implicit Threading, CPU Scheduling, Multi-Processor Scheduling, Real-Time CPU Scheduling, Algorithm Evaluation, process synchronization, POSIX Synchronization, dead locks, memory management, Contiguous Memory Allocation, virtual memory, storage management, HDD Scheduling, NVM Scheduling, error detection, storage device management, RAID structure, file system, file-system interface, file-system implementation, file-system structure, file-system operations, directory implementation, Free-Space Management, File-System Internals, File-System Mounting, file sharing, virtual file systems, remote file systems, security, program threats, Cryptography, Role-Based Access Control, access matrix, virtual machines, networks, Distributed File Systems, remote file access, Linux system, Kernel Modules, programmer interface