The contents of this book represent a series of lectures given in the engineering level class on cloud Computing. We have great pleasure in presenting the First edition of this book. ¿CLOUD COMPUTING PARADIGM¿ is a core subject for B-Tech, BE, BSc, MCA, BCA and Diploma Students for interring the computer technology. This book is primarily intended to serve as a textbook in according with syllabus of Cloud Computing offered by various universities in India as well as abroad. Cloud Computing is a movement started sometime during the middle of the first decade of the new millennium; the movement is motivated by the idea that information processing can be done more efficiently on large farms of computing and storage systems accessible via the Internet The authors have identified the problems of the student ¿level¿ in this book, a significant effort has been made to find simple ways to develop theoretical as well as Practical of Fundamentals of Cloud Computing.