This paper presents the contributions of the present issue of Quaderns in the framework of the homage to Leibniz, three hundred years after his death. Leibniz was a multifaceted figure, devoted to study and analysis of Nature and society. His contributions are studied in this issue mostly from the perspective of mathematics, but we should be aware that, for Leibniz, mathematics was a powerful way to understand and to change the world. Mathematics was also a relevant component of technology.
Massa Esteve, M. R.; Roca Rosell, A. M. C. Gottfried Wilhelm Leibniz, 300 anys després. "Quaderns d'història de l'enginyeria", 2018, vol. XVI, p. 1-10.