This revised textbook presents updated material on its core content: an end-to-end Io T architecture that is comprised of devices, network, compute, storage, platform, applications along with management and security components. As with the second edition, it is organized into six main parts: an Io T reference model; fog computing and the drivers; Io T management and applications; smart services in Io T; Io T standards; and case studies. This edition’s features include overhaul of the Io T Protocols (Chapter 5) to include an expanded treatment of low-power wide area networks including narrow band Io T (NB-Io T) protocol, updated Io T platforms and capabilities (Chapter 7) to include comparison of commercially available platforms (e.g. AWS Io T Platform, Google Cloud Io T Platform, Microsoft Azure Io T Platform, and PTC Think Worx), updated security (Chapter 8) to include approaches for securing Io T devices with examples of Io T devices used in security attacks and associated solutions including MUD and DICE, and finally new Appendix B to include six Io T project detailed for students.