This Book presented a brief overview on introduction of cloud computing. Cloud computing is growing day by day. Cloud computing provides many resources and applications for the use at any time and consumers can get benefits from the cloud. There is no need to manage, maintain and build an infrastructure for storing and accessing the data and application. With the help of internet consumers can access any application. The cloud provides service models IaaS, PaaS and SaaS as a service. The IaaS and PaaS are managed by the provider or 3rd party. The consumer can access the data from SaaS and fully control over software. The consumers can also use the public cloud, private, hybrid and community cloud depend upon the requirement and usage of consumers. The private cloud provides more security than others. Hybrid cloud also provides benefits to consumers. The cloud provides virtualization layer that helps to create and destroy virtual machines. Virtual machines process the data and application more efficiently and effectively. Also provides security, load balancing and helps in the education system.