File Name       Description                      Reference in Book
---------       -----------                      -----------------
nor.v		Example of a nor gate		 Section 11.2.1
		built using  switches.	

mux.v		Example of a 2-to-1 mux		 Section 11.2.2
		using switches.

cff.v		Example of a simple CMOS	 Section 11.2.3
		flip-flop.
