We've had digital revolutions in communication and computation, but precisely the same idea, precisely the same math Shannon and Von Neuman did, hasn't yet come out to the physical world. So, inspired by that, colleagues in this program -- the Center for Bits and Atoms at MIT -- which is a group of people, like me, who never understood the boundary between physical science and computer science. I would even go further and say computer science is one of the worst things that ever happened to either computers or to science -- (Laughter) -- because the canon -- computer science -- many of them are great but the canon of computer science prematurely froze a model of computation based on technology that was available in 1950, and nature's a much more powerful computer than that.