Prof. Patt,

	On question 11 it ask about a multiplexer.  Is multiplexer an 
	esoteric term for something else we went over in class? I looked 
	everywhere in the book (including the index) for a definition of 
	a multiplexer with no success. Can you point me in the right 
	direction in the book that relates to multiplexers?

	<<name withheld>>

Yes, it is a longer word for something we went over in class, 
and is also in the book.  I thought I did use the term multiplexer 
at least once, but maybe I was dreaming.  In any case, the common 
name for it is MUX, and that 
is also in the book and listed in the index.

Good luck finishing the problem set.

Yale Patt