This comprehensive compendium is about managing information systems and focuses on relationships between information, information systems, people and business. The impacts, roles, risks, challenges as well as emerging trends of information systems are an important element of the book. Essential and critical information systems management skills including using information systems for competitive advantages, planning and evaluating information systems, developing and implementing information systems, and managing information systems operation form a critical part of this unique reference text. Current topics like digital platforms, agile organization, DevOPs, blockchain, 5G, data center and quantum computing prove indispensable for readers who want to stay in the forefront of today's complex information systems.