Seventh edition updates the material and presents new information that is relevant to the topic of desktop operating systems, including Windows, Apple macOS, Linux, and Chrome OS. In addition to these operating systems, this edition includes new information on mobile operating systems, as well as chapters on subjects peripheral to operating systems, such as computer security, desktop virtualization, and connecting computers and mobile devices to networks. I carefully revised every chapter as needed, with more illustrations and plenty of hands-on opportunities. I added content throughout, while working to streamline the book in response to feedback we received from instructors"--