Visualizing information flow
	Blindness, visual cortex, and algebra
		- Visualizing stuff in general
	It's like a bunch of wires or tubes

PDB:  The Python Debugger
	Let's watch some code run!

Objects, and encapsulation
	PIL, and what can you do with an image?

Where are we going with objects?
	They'll go under the radar a bit for a while now
	But they'll be back later

Precedent in other languages
	*nix file descriptors	
	pthread_attr_t
	c++, java, etc:  Pretty much the same
	Object-oriented is an organizational technique
		- "Object-oriented" languages are intended to make it easy or mandatory

Print out line numbers (scolor)
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vpython intro