Researchers in the field of artificial intelligence (AI) and related disciplines using large language models, engineers dealing with large-scale data processing and analysis, and AI product managers, seeking an up to date, in-depth yet accessible understanding of the principles, mechanisms and architecture of large language models such as ChatGPT and their application to everyday life and work; T professionals, software developers, those working to enhance security and privacy in data management, and technical managers in industries such as healthcare, education and finance, and the governmental, administrative, legal and technology sectors where AI and machine learning are becoming increasingly relevant and who need a resource to assist in their understanding of current AI and its implementation in various professional contexts