Overview of the NIST Artificial Intelligence Risk Management Framework (AI RMF), a voluntary set of guidelines released by the U.S. National Institute of Standards and Technology in January 2023. The AI RMF is designed to help organisations manage the risks associated with artificial intelligence systems and promote the development and deployment of trustworthy and responsible AI. It outlines four core functions – Govern, Map, Measure, and Manage – and emphasises characteristics of trustworthy AI like validity, safety, security, and fairness. The documents also discuss the framework's development, its intended audience of "AI actors", available resources such as the AI RMF Playbook and Profiles, and its relationship to other AI governance efforts internationally, including the EU AI Act and ISO standards, as well as highlighting implementation challenges and providing real-world examples of its application across various sectors.