The book contains: System Software, Overview of all system softwares: Operating system, I/O manager, Assembler, Compiler, Linker, Loader Fundamentals of Operating System, OS services and Components, Multitasking, Multi-programming, Time-sharing, Buffering, Spooling Process and Thread Management, Concept of process and threads, Process states, Process management, Context switching, Interaction between processes and OS. Multi-threading Concurrency Control, Concurrency and Race Conditions, Mutual exclusion requirements, Software and hardware solutions, Semaphores, Monitors, Classical IPC problems and solutions, Deadlock, Characterization, Detection, Recovery, Avoidance and Prevention.