The document outlines the key topics in internet of things (IoT) including what IoT is, how it works, current status and future prospects, applications, and technological challenges. It begins with defining IoT as the network of physical objects embedded with sensors that can collect and exchange data over existing network infrastructure. It then discusses how IoT works through technologies like communication, sensing, and embedded processing. Examples of current and future applications are also provided across various industries. The document concludes by discussing some criticisms and controversies around privacy, security, and social impacts of large-scale IoT adoption.