This market-leading book provides developers with the latest and most relevant information on todays operating systems. In addition, it uncovers the fundamental concepts that have remained constant throughout the evolution of those systems. The eighth edition adds simulation content throughout the pages along with new programming projects. The simulators will help readers develop a conceptual understanding of the concepts. The material has also been updated with the latest information on all the major operating systems. By following the approach in this book, developers can more easily comprehend the details related to specific systems.