About the Book This edition was etensively reviewed by a number of professors who teach the subject and by professionals working in the field. As a result, the narrative has been clarified and tightened, and illustrations have been improved. Linu coverage: The Linu material has been updated and epanded to reflect changes in the Linu kernel since the 8th Edition. Android coverage: The Android material has been updated and epanded to reflect changes in the Android kernel since the 8th Edition. Virtualization coverage: The chapter on virtual machines has been completely rewritten to provide better organization and an epanded and more up-to-date treatment. In addition, a new section has been added on the use of containers. Cloud operating systems: New to this edition is the coverage of cloud operating systems, including an overview of cloud computing, a discussion of the principles and requirements for a cloud operating system, and a discussion of a OpenStack, a popular open-source Cloud OS. IoT operating systems: New to this edition is the coverage of operating systems for the Internet of Things. The coverage includes an overview of the IoT, a discussion of the principles and requirements for an IoT operating system, and a discussion of a RIOT, a popular open-source IoT OS. Embedded operating systems: This chapter has been substantially revised and epanded, including: The section on embedded systems has been epanded and now includes discussions of microcontrollers and deeply embedded systems. The overview section on embedded OSs has been epanded and updated. The treatment of embedded Linu has been epanded, and a new discussion of a popular embedded Linu system, Clinu, has been added. Concurrency: New projects have been added to the Projects Manual to better help the student understand the principles of concurrency.