The document defines key concepts related to the Internet of Things (IoT), including definitions of IoT, how IoT works, enabling technologies, and common standards. Specifically, it defines IoT as a network of physical devices connected via the internet that can sense and communicate with their environment and with other devices. It describes the main components of an IoT system including sensors, communication methods, computation technologies, and services. Finally, it provides examples of identification methods, communication protocols, hardware platforms, and semantic technologies that support IoT applications.