Information System

The term information system (IS) sometimes refers to a system of persons, data records and activities that process the data and information in an organization, and it includes the organization's manual and automated processes. Computer-based information systems are the field of study for information technology, elements of which are sometimes called an "information system" as well, a usage some consider to be incorrect.

History of information systems
The study of information systems originated as a sub-discipline of computer science in an attempt to understand and rationalize the management of technology within organizations. It has matured into a major field of management, that is increasingly being emphasized as an important area of research in management studies, and is taught at all major universities and business schools in the world. Börje Langefors introduced the concept of "Information Systems" at the third International Conference on Information Processing and Computer Science in New York in 1965. [4]
Information technology is a very important malleable resource available to executives.[5] Many companies have created a position of Chief Information Officer (CIO) that sits on the executive board with the Chief Executive Officer (CEO), Chief Financial Officer (CFO), Chief Operating Officer (COO) and Chief Technical Officer (CTO).The CTO may also serve as CIO, and vice versa.

Applications of information systems
Information systems deal with the development, use and management of an organization's IT infrastructure.
In the post-industrial information age, the focus of companies has shifted from being product-oriented to knowledge-oriented in the sense that market operators today compete in process and innovation rather than in products: the emphasis has shifted from the quality and quantity of production to the production process itself--and the services that accompany the production process.
The biggest asset of companies today is their information--represented by people, experience, know-how, innovations (patents, copyrights, trade secrets)--and for a market operator to be able to compete, he or she must have a strong information infrastructure, at the heart of which lies the information technology infrastructure. Thus the study of information systems focuses on why and how technology can be put into best use to serve the information flow within an organization.
http://en.wikipedia.org/wiki/Information_Systems