This document provides an introduction to the Internet of Things (IoT). It defines IoT as connecting everyday objects like refrigerators, cars, and home appliances to the Internet. Currently only 1% of objects are connected, but that number is expected to grow to 50 billion connected devices by 2020. The document discusses the importance of IoT and provides examples of applications like smart grids, healthcare devices, and industrial control systems. It also summarizes several protocols that enable IoT communication over power lines and wireless networks.