T for Turing

The scientific activity of Alan Mathison Turing is briefly surveyed stressing the variety of his scientific interests, which are not limited to computability and the celebrated machine that bears his name. The way in which he faced all the questions and projects, always following original paths with a strong personal involvement, make him an interpreter of our technological word. Although more than 60 years have elapsed since his death, we can still find in his work and life the key for understanding how to address in a correct way the complex problems posed by the development of our society.