Cloud computing is highly preferred topic for research as this being a novel field, it opens many of the avenues for research from different perspectives and objectives. This book discusses several aspects related to the current technology of cloud computing that has far reaching consequences in the world of Information Technology directly to all the players in IT and indirectly to users of IT at large. This book sets as its goal, the thorough exploration of the parameters those are concerns of users and developers and vendors. As the term 'Cloud Computing' was coined in 2006, there are no articles published before this though the technology did exist prior to this period. So, articles are chosen for this are mainly under four categories as cloud technology, business issues, applications and general issues. Under these categories, the main emphasis is on technical issues like performance, scalability, network, and data management. This work outlines various issues related to deployment of cloud technologies, their impact on user organizations with regard to infrastructure, application and security.