NIST released Special Publication 500-325, Fog Computing Conceptual Model, a report that presents the conceptual models of fog and mist computing and how they relate to cloud-based computing models for the Internet of Things (IoT). An alternative to cloud computing is fog computing, a decentralized infrastructure in which data is accessed locally, which significantly reduces the amount of time it takes to access the data. The report presents the conceptual model of fog computing and an alternative model called mist computing and how they relate to cloud-based computing models for IoT. The report also characterizes important properties and aspects of fog computing, including service models and deployment strategies, and provides a baseline of what fog computing is and how it may be used.