This document discusses the "Internet of Things" (IoT) and its key components. The IoT connects physical objects through sensors that collect and share data over wireless networks. These "things" can provide identification, store information, collect sensor data, process information, communicate messages, and actuate physical controls. Common examples of things already using these features include chairs, windows, ceiling fans and light bulbs embedded with devices. The document also provides resources for learning how to design and build IoT devices using tools like Arduino, including tutorials on sensors and programming.