Now it should be pretty clear who should take this course. Anybody interested in how the brain works is welcome to this course. No matter what your major is, biology, engineering, psychology, computer science, whatever, you will learn something from, and, equally importantly, contribute something to the class. In fact, I hope this course can be a many-way traffic. The biologists and psychologists can learn from each other, they may also learn some mathematical methods and ways of thinking for information processing, while the engineers and computer scientists may learn how some ``wetware'', our brain, can do things differently from, and a lot of times much better than, the hardware and software they are familiar with. And in the same time everybody will learn something about our vision.