Web Operating System is an internet service through which a user can access his computer data remotely anywhere on any computer and in any part of earth were internet is available. It has been termed as “Web Operating System” because they are present on the web and not on the computer of the user, all the data is being stored on the servers of the Web OS provider. Recently there was big roar on internet about the word “iCloud”. It was an introduction of one more operating system in the category of web operating systems. Web Operating systems (web OS) was introduced as a thought that one might be able to play with application, store data, and share it on the internet from anywhere in the world. So does a web OS do. Today web OS are capable of storing large amount of user data as large as 50 GB providing a very simplified and user friendly interface.