This document discusses Internet of Things (IoT). It defines IoT as connecting physical objects to the Internet through sensors that allow the objects to transfer data and be identified without human interaction. The document lists common IoT protocols, domains including medical, industrial and home, and sensor types. It discusses trends showing the growth of connected devices and expansion of IoT domains. The author's interest areas in IoT are remote maintenance, supply chain optimization, and infrastructure management to reduce waste and costs by computers knowing everything about connected things.