I don’t get it! Every fall the new telephone book arrives, filled with lots of information and with loads of new numbers, so why don’t we design a class that covers this material? Nowhere do we teach this information. Why don’t we expect folks to study the telephone book and memorize the numbers? Grudgingly, I am forced to admit that no real justification for memorizing telephone numbers exists, as tempting as it might be for me to teach this course.