This document provides an overview of the Internet of Things (IoT). It defines IoT as the intelligent connectivity of physical devices that can drive gains in efficiency and quality of life. The history of IoT is traced back to 1997, and key developments include the founding of the Auto-ID Center in 1999 and the first IoT conference in 2008. Applications of IoT mentioned include smart home devices, industrial automation, smart cities, and health monitoring. Challenges and the future of connecting everything via sensors are also discussed.