The new story goes like this:

	computers store data in memory.  The types of storage are few but
	esential

		   char
		   int, long, short, unsigned
		   float, double
	
		aggregate types

		   array - all items are same, indexed by integer
		   struct - items can be any mixture, items identified by member name 

	there is one more type: the pointer - today's topic

Now, let's talk about things we might want to do with memory

	a. Access arrays - efficiently

	b. Pass variables by reference
		- e.g. modify values
		- e.g. fill in structs or pass structs without copy

	c. Substrings - pass part of a string after the start

	d. Specify memory locations for read/write

	c. How can we do these

Let's focus right now on Ideas

	a. array access x[i] means start at spot x and go i boxes ahead

	   but that's redundant work, why not say here, then here then here...
	   How can we say right here instead of i units from x?

	b. Pass a struct by reference
	   We have the struct here in memory , why not tell the function
	   where the form is?
Let's look at these two things from the perspective of memory

	arrays - usual notation is  x[i] where x is the name of the array
		 and i is the offset.  How does that work?

	other types - send the location (where in memory) a variable is
		      instead of copying the value.