Operating system (OS) is a program used in either software or a firmware. This program is composed of a set of instructions for managing resources of a particular system. It also acts as the bridge between the user and the computer hardware thus providing instructions for easy and maximum usage of computer resources.
The Internet and Web Technologies have significantly changed our perception, understanding and dealings with information. In the early days, information was considered to be document- centric model. Information is embedded in a document that requires a lot of software to produce. Documents are believed to be composed of static information. But those were the days. Now, information concept has shifted to a dynamic model, meaning structured and unstructured information are being presented in a web browser. Information system serves as the window to view data from a vast and still growing number of sources such as: database management systems, client-server networks, internet websites, intranet sites, and syndicated services or information feeds.