1992, Ramzan A. Khuwaja, Martha W. Evens, Allen A. Rovick and Joel A. Michael, Knowledge Representation for an Intelligent Tutoring System Based on a Multilevel Causal Model, in Claude Frasson, Gilles Gauthier, Gordon McCalla (editors), Intelligent Tutoring Systems: Second International Conference, ITS '92,
Knowledge is central for an intelligent system. A knowledge representation framework, which distinguishes between several generic types of knowledge and structures them in several layers, provides one of the most powerful ways of designing an intelligent system.

This computer program can be considered an intelligent system for the domain of Non-linear Dynamical Systems (NDS) because it uses SC techniques to obtain the "best" mathematical model for a given dynamic system.

2007, Adrianna Kosierkiewicz and Ngoc Thanh Nguyen, The Statistical Verification of Rough Classification Algorithms in Bruno Apolloni, Robert J. Howlett, L. C. Jain (editors), Knowledge-Based Intelligent Information and Engineering Systems (conference proceedings),
German Tutor [5] is another intelligent system which helps learning foreign languages.

Intelligent system

Meaning

Noun