Today we can look back on several years of data processing support in architecture. When computer aided architectural design - CAAD - entered the field there was a lot of utter confusion in the beginning, a lot more than usually in other more technical application-fields of CAD. The architect is a very special CAD-user, as he is a very special member of all those other very analytical and scientific faculties around. There is a lot of tradition involved, tradition that has got its roots far back in medieval and classic periods and is rich of art and creativity and intuition. Mostly lots more of this than scientific analysis, exact research, and similar stuff. We could spot a large number of architects who would have been horrified when they...