What is an Information System

Information system consists of physical and nonphysical components working together. A computer alone is not an information system. A computer combines with a software program may constitute an information system, but only if the program is designed to produce information that helps an organization or person to achieve a specific goal. Information system can be further
defined as a set of interrelated components that collector retrieve, process, store and distribute
information to support decision making and control in an organization. Information systems can also help managers and workers to analyze problems, visualize complex subjects and create new subjects. It may contain information about significant people, places and things within the organization or in the environment surrounding it. All information systems (IS) operate in the same basic fashion whether they include a computer or not. However, the computer provides a convenient means to execute the four main operations of an information system. The four main activities are entering data into the IS (input, changing and manipulating the data in the IS (data processing, getting information out of the IS (output) and storing data and information (storage. Besides the four main operations, feedback is also needed to return the output to the appropriate people or activities in the organization to evaluate and refine the input.

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