 Fog computing is a new paradigm in which cloud computing is brought closer to the edge of the network, allowing for more efficient and secure services for IoT users. It offers faster response times and higher quality than traditional cloud computing, making it ideal for IoT applications. This paper reviews the current state of fog computing and its integration with the IoT, discussing the benefits and challenges associated with this approach. Additionally, the paper explores the architectural components of the fog and emerging IoT applications that can benefit from its use. Finally, open issues and future research directions are discussed. This article was authored by Haney F. Atlam, Robert J. Walters and Gary B. Wills.