Issue Summary: http://archive-edutice.ccsd.cnrs.fr/edutice-00000876 computerisation of the school environment remains an essential priority. That said, it is necessary to take into account recent epidemiological studies carried out in France and abroad on human physiological and psychological limitations in relation to computers. Therefore, we need to develop four points: the myth of human/machine homeostat, physiological limits, psychological limits, and finally prevention.