Information System – the term is a very popular one these days. Everyone is talking about Information System and how this thing is connected or related closely with computer science. As a matter of fact, this is no doubt true. Information System is a brunch of computer science, where computer science is playing the role of the mother or root subject. Information System cannot exist excluding it.

So, what is Information System? To be brief, an Information System (or according to some people, Application Landscape) is some kind of combination of information technology and the activities of people associated to support and execute the necessary operations and management of the system with the responsibility of decision-making. It's a system of people and technology depending on each other to achieve some common goal. The very name suggests not only this co-operation of man and machine, but also the way in which the interactions between them work in support of various business processes.

Information Technology is distinct from Information System as the later is generally seen as a component of the former one, i.e. communication technology. Information System also helps to control and manage the activities and performance of a business process; hence they are not identical too. An Information System can be viewed as a work system where all activities are devoted to different types of digital processing.

The main components of a typical Information system are computers, stored facts, instructions and procedures. Those instructions and procedures are applied on those facts in store to create new information or manage the existing ones. That's the basic structure of an information system and its working principle.

Some laymen find no difference between information systems and computer science. But in fact, information system is not computer science and vice-versa. The main object of an information system is to focus on exploring the platform or interface between business management and information science with the inseparable aid of computer science. Thus computer science is merely used as a tool to make it work. Computer science here acts as a bridge between pure information technology and human activity systems. So by the term ‘Information System' we refer to the wider system consisted of raw data, people related to the organization and their activities, both manual and computer-based. Information systems are now leading to the largest economic growth all over the world as they are the center of knowledge-based organizations as well as pure technical industries.