Very often the presentation of research activities is stifled by the following dilemma: how does one present at the same time a cross-disciplinary approach (ex. Systems Sciences) without betraying the specialists and their specific fields of activity? Supélec cannot really circumvent this dilemma either. Nevertheless, Supelec's research try to organize things into seven major fields of study (see figure below) closely linked to Systems Sciences since they are at the center of all interactions.