File Name       Description                      Reference in Book
---------       -----------                      -----------------

mux.v		Illustrates a 2-to-1 mux	 section heading "tri"
		implemented using bufif gates	 

trireg.v	Illustrates the use of the	 section heading "trireg"
		trireg declaration.

tri0.v		Illustrates the use of the	 section heading "tri0, tri1"
		tri0 declaration.

wand_wor.v	Illustrates the use of 		 section heading "wor, wand, trior,
		wand and wor declarations.	 triand"
