The term information system refers to information technology that is used by people to accomplish a specified organizational or individual objective. The technology may be used in the gathering, processing, storing, and/or http://www.answers.com/topic/dissemination-1 of information, and the users are trained in the use of that technology, as well as in the procedures to be followed in doing so. The specific technologies that collectively comprise information technology are computer technology and data communications technology. Computers provide most of the storage and processing capabilities, while data communications-specifically networks-provide the means for dissemination and remote access of information.
Advances in computer hardware, software, and networking technologies have spurred an evolution in the structure, design, and use of corporate information systems.
information systemA business application of the computer. It is made up of the database, application programs and manual and machine procedures. It also encompasses the computer systems that do the processing.
Processing the Data
The database stores the subjects of the business (master files) and its activities (transaction files). The application programs provide the data entry, updating, query and report processing.
The Procedures
The manual procedures document how data are obtained for input and how the system's output is distributed. Machine procedures instruct the computer how to perform scheduled activities, in which the output of one program is automatically fed into another.
Transaction Processing
The daily work is the online, interactive processing of the business transactions and updating of customer, inventory and vendor files (master files).
Batch Processing
At the end of the day or other period, programs print reports and update files that were not updated on a daily basis. Periodically, files must be updated for routine maintenance such as adding and deleting employees and making changes to product descriptions. See transaction processing.
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 a sense that market operators today compete on process and innovation rather than product : 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 in people, experience, know-how, innovations (patents, copyrights, trade secrets), and for a market operator to be able to compete, he/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.
Information Systems has a number of different areas of work:
Each of which branches out into a number of sub disciplines, that overlap with other science and managerial disciplines such as computer science, pure and engineering sciences, social and behavioral sciences, and business management.
Information technology developmentThe IT Department partly governs the information technology development, use, application and influence on a business or corporation. A computer based information system, following a definition of Langefors[5], is:
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