[Three institutional journals: Journal de l'École Polytechnique, Annales des Mines, Annales des Ponts et Chaussées].

The three journals studied are characterized by their own institutional background, which explains most probably their centenial longevity, and their slow evolution. The Journal de l'École polytechnique is more academic. The two Annales publish scientific, technical and legislative texts. They are a bond between the administration and its engineers. As the bulk of published articles is huge and diversified, it was important to develop an effective system of access to the various articles.