This book presents the state-of-the-art in supercomputer simulation. It includes the latest findings from leading researchers using one of Europe&s top systems at the High Performance Computing Center Stuttgart (HLRS) in 2023. A wide variety of topics are discussed from all fields of computational science and engineering, ranging from CFD to computational physics and from chemistry to computer science, with a special emphasis on industrially relevant applications that deliver a high level of sustained performance. Covering the main methods in high-performance computing, and featuring a wealth of color illustrations and tables of results, the book will be of particular interest to scientists and engineers who seek to achieve the best performance for production codes.