The distribution of online information resources, especially via WWW, far from being the long awaited dream, is turning into a nightmare in the form of an information avalanche. Unskilled users rarely obtain satisfactory results when conducting searches, and even experts tend to commit mistakes when using search tools. The solution to the problems of information retrieval in this area might be found in intelligent information agents. The objective of the this article is to identify, define and classify the different types of intelligent agents, focussing on those used for information retrieval.
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