The research described in this paper was funded by the 'Deutsche Forschungsgesellschaft' DFG within their collaborative research program 378 on 'resource adaptive cognitive processes'. Parts of the first installation of IRREAL were funded by the University of Saarbruecken and the German Research Center for Artificial Intelligence (DFKI). The infrared transmitter hardware was designed by Christoph Bartelmus who also wrote the respective transmission protocols and libraries. The client application on the Palm Pilot was written by Martin Gisch, Nils Kammenhuber, Frank Luithle and Peter Rullmann. Palm Pilots and IBM Workpads were kindly provided by Deckarm & Co., St. Ingbert, Germany.