Alan Turing and John von Neumann - Their Brains and Their Computers

Were it not for two decades of the intertwined intellectual lives of Alan Turing and John von Neumann, the disciplines of mathematics and computer science would not be what they are today. Their shared intellectual path began in 1933, when college student Turing wrote to his mother, Sarah, that his prize book was von Neumann's Mathematical Foundations of Quantum Mechanics, which he described as being "very interesting, and not at all difficult reading, although the applied mathematicians seem to find it rather strong."