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Information Systems is the discipline concerned with the development, use, application and influence of information systems. An information system, following a definition of Langefors (e.g., see [1]), is a technologically implemented medium for recording, storing, and disseminating linguistic expressions, as well as for drawing conclusions from such expressions.
The technology used for implementing information systems by no means has to be computer technology. A notebook in which one lists certain items of interest is, according to that definition, an information system. Likewise, there are computer applications that do not comply with this definition of information systems. Embedded systems are an example. A computer application that is integrated into clothing or even the human body does not generally deal with linguistic expressions. One could, however, try to generalize Langefors' definition so as to cover more recent developments.

See also
Data Processing System
Information Processing System
Data modeling
Data architect
Database
Metadata
Data Reference Model
Predictive Model Markup Language
Environmental Modeling Center
Semantic translation
European Research Center for Information Systems (ERCIS)
Information system
Management Information Systems
Business informatics

المصدر :
http://en.wikipedia.org/wiki/Information_systems