Abstract
A program of computer-assisted teaching, called AEDM, has been developed to simulate, with a conversational type terminal, the natural process of medical decision making. This system rests on two softwares, 'teaching' and 'inquiring', with 10000 PASCAL instructions and the database of a computer-assisted diagnostic system (about 100 MO). The study describes the objectives and the characteristics of a system based on a simulation program; using natural procedures and non-specialized software is useful to develop computer-assisted teaching concerning different fields of pathology.