Marc Mittelmeijer studied mathematics at the faculty Mathematics and Informatics at the Technical University of Eindhoven. Since 1984 Marc teaches mathematics and information technology at the Hogeschool Eindhoven, Faculty Economics Sr Business Informatics. Besides teaching he is researching the behavior of neural networks in a financial environment. Marc can be reached at M.Mittelmeijer@fe.hse.nl. Marc has written the following articles: Building an Editor (April 1995) Building an Editor - Part 2 (June 1995) Building an Editor - Part 3 (November 1995)