International Journal of Scientific and Research Publication (IJSRP)
Cloud computing or in shorthand just the \"Cloud\", is a pool of resources, software and information that are accessed over a network (Internet). Cloud provides services based on \"Pay for what the user use\" principle i.e., pay for only those resources used for a particular time. The information and services are provided to various computers and devices as utility (like electricity grid). Cloud users require a usage accounting infrastructure not only capable of supporting billing as an accounting application, but is also supporting all kinds of applications.