This book, designed for the first course on Operating Systems, aims at demystifying the subject by using the step-by-step approach of going from the very basis to advanced concepts. This book would be useful not only to the undergraduate students of computer science but also to application programmers who are interested in knowing about the internals of the operating systems.Table of Contents: Chatper 1 History of the Operating Systems Chatper 2 Computer Architecture Chatper 3 Operating System-Functions and Structure Chatper 4 Information Management Chatper 5 Process Management Chatper 6 Inter Process Communication Chatper 7 Deadlocks Chatper 8 Memory Management Chatper 9 Operating System: Security and Protection Chatper 10 Parallel Processing Chatper 11 Operating Systems in Distributed Processing Chatper 12 Windows NT/2000-A Case Study Chatper 13 Unix: a Case Study Chatper 14 Linux-a Case Study Chatper 15 Multimedia Operating Systems Index