Many individuals and enterprises will soon be computing in the clouds. Cloud computing offers on-demand, utility-like availability of computing resources at a low cost. A critical understanding of cloud computing is essential to leverage the opportunities and benefits that this new computing paradigm offers. This book provides a comprehensive overview of cloud computing concepts, technologies, businesses models, strategies, and applications. It also examines potential risks and challenges of cloud computing. Written by international experts, the text addresses different aspects of cloud computing, including resource issues, security, and cost-effective scalable applications.