This document provides an overview of the Internet of Things (IoT). It defines IoT as connecting physical objects through sensors and software to the internet. It discusses how processing power and low-cost chips are enabling more smart devices and sensors. The document outlines the growing number of connected devices and potential markets for IoT. It also discusses opportunities IoT provides and challenges around interoperability. Finally, it provides an overview of Microsoft's role and technologies for connecting devices and analyzing data in the cloud.