This book will focus on the development of scalable and performance portable scientific applications for future exascale computer systems. The main body of the book will be a series of chapters that center on the programming practices of application developers to achieve scalability on high-end computer systems while at the same time maintain architectural and performance portability for different computer technologies. Scientific application developers learn best by example, and this book will be designed to provide a wide range of examples of what developers have done and are doing to...