Cloud computing has transformed the way organizations and individuals access, store, and process data. Over the past two decades, it has evolved from a conceptual framework to a fundamental technology driving businesses, research, and innovation. Whether it is the seamless availability of storage, scalable computational power, or on-demand provisioning of resources, cloud computing has become an integral part of modern digital infrastructure. This book, "Cloud Computing", aims to provide a comprehensive exploration of cloud technologies, covering foundational principles, architecture, virtualization, security, storage, and emerging advancements. It is designed to cater to students, researchers, IT professionals, and industry practitioners who seek a deep understanding of cloud computing and its real-world applications.