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Relationship between well-known AHS

Notes:

Before we go on to the next system we have a look at the evolution in some systems developed by the people who created ISIS-Tutor. ISIS-Tutor is a descendent of ITEM/IP, developed at the Moscow State University. The evolution continued with SQL-Tutor, developed by Tanja Mitrovic who moved to the University of Canterbury in New Zealand, and with ELM-ART, developed by a group including Peter Brusilovsky, Gerhard Weber, Alfred Kobsa and Marcus Specht at the University of Trier in Germany. Whereas ISIS-Tutor was still developed in Pascal, Both SQL-Tutor and ELM-ART were developed in Lisp, which is not surprising for ELM-ART because that is a Lisp-tutor. Interbook is a decendent of ELM-ART, developed by Peter Brusilovsky, John Eklund and Elmar Schwartz, when Brusilovsky moved to the Carnegie Mellon University in Pittsburgh, USA. Interbook is still implemented in Lisp. The next version of Interbook however is expected to be based on the AHA! engine in a new version that is still to come.