The document discusses the Internet of Things (IoT). It defines IoT as a system of interrelated computing devices that can transfer data over a network without human interaction. An IoT system integrates sensors that collect data, connectivity methods to transfer the data to the cloud, data processing, and user interfaces to make the information useful. The document also examines current and future applications of IoT such as smart homes, wearables, smart cities, and connected cars. It concludes that IoT technologies connect the virtual and physical worlds to improve lives, but the infrastructure remains vulnerable to cyberattacks.