One of the buzzwords in the Information Technology is Internet of Things (IoT). The future is Internet of Things, which will transform the real world objects into intelligent virtual objects. The IoT aims to unify everything in our world under a common infrastructure, giving us not only control of things around us, but also keeping us informed of the state of the things. This book has been written keeping in mind the immediate needs to understand the topic by students, researchers, and IT professionals who seek to build and maintain a IoT infrastructure.The text presented in the book focuses on definitions, geneses, basic requirements, characteristics and aliases of Internet of Things. The main objective of this Book is to provide an overview of Internet of Things, architectures, and vital technologies and their usages in our daily life. However, this book will give good comprehension for the new researchers, who want to do research in this field of Internet of Things and facilitate knowledge accumulation in efficiently.