"We only have four more lectures left, and what Professor Demaine and I have decided to do is give two series of lectures on sort of advanced topics. So, today at Wednesday we're going to talk about parallel algorithms, algorithms where you have more than one processor whacking away on your problem. And this is a very hot topic right now because all of the chip manufacturers are now producing so-called multicore processors where you have more than one processor per chip. So, knowing something about that is good. The second topic we're going to cover is going to be caching, and how you design algorithms for systems with cache...