Abstract
The internet of things is everywhere. It is an emerging and wide scope of study. Every day there is a new addition to this technology. It is simply defined as a network over which a collection of things communicate with each other using internet as a medium of communication. It is also sharing information with each other for the ease, welfare, and convenience of human beings. It makes human life easier. About one trillion devices are expected to connect with this technology in the upcoming future (most probably in 2025). Each and every year its popularity increases. It makes smart health; provides more safety, comfort, and convenience; and also increases wisdom. IoT is one of the platforms of today's smart city and smart energy management systems. This chapter explores IoT technologies and applications.