
A decision support system (marketing definition) is a systematic collection of data, techniques and supporting software and hardware by which an organization gathers and interprets relevant information from business and the environment and turns it into a basis for making management decisions. A DSS differs from a management information system in t...
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http://archive.ifla.org/VII/s34/pubs/glossary.htm

A Decision Support System (DSS) is a computer-based information system that supports business or organizational decision-making activities. DSSs serve the management, operations, and planning levels of an organization (usually mid and higher management) and help to make decisions, which may be rapidly changing and not easily specified in advance (...
Found on
http://en.wikipedia.org/wiki/Decision_support_system

(from the article `information system`) All information systems support decision making, however indirectly, but decision support systems are expressly designed for this purpose. The two ... More recently, decision support systems (DSS) have been developed to project and predict the results of decisions before they are made. These ... ...
Found on
http://www.britannica.com/eb/a-z/d/22
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