Problems in decision making and in other areas such as pattern recogni tion, control, structural engineering etc. involve numerous aspects of uncertainty. Additional vagueness is introduced as models become more complex but not necessarily more meaningful by the added details. During the last two decades one has become more and more aware of the fact that not all this uncertainty is of stochastic (random) cha racter and that, therefore, it can not be modelled appropriately by probability theory. This becomes the more obvious the more we want to represent formally human knowledge. As far as...

ANDRE JONES As everybody knovs, the computer has been used for over ten years in education. Since the first conference at Irvine "The computer in physics instruction" (1965). various meetings on this subject have been organized in many places, which dealt with very different subjects. Work groups have been set up at international level (by the UNESCO, OECD, ... ) and at national level in various countries. Of the prominent extra-European meetings, we will only keep the most important ones. for example those held in the U.S.A. on the "Computer Use in Undergraduate Curriculum" and in Canada,...