Abstract: Internet of Things is the idea of associating any gadget (in as much as it has an on/off change) to the Internet and other associated devices. The IoT is a monster network of related things and individuals, all of which gather and offer information about how they are utilized and about the climate around them. Specialists gauge that the IoT will comprise of around 30 billion items by 2020. This paper presents an examination dependent on IoT and its applications in various field of science and technology. Alongside, the presentation of the IoT writing audit is additionally given. The paper likewise examines the architecture and components of the IoT alongside its various applications.