From Warren WeaverÕs Forward to ShannonÕs Mathe. Theory of Comm.
	Study of simple systems: 2 or 3 variables
	Problems of disorganized complexity (billions of variables).
	(e.g., gasses, hereditary in gene pool)
	Tools: statistical mechanics, probability theory.
	Problems of organized complexity (intermediate number of interrelated variables)
	(Johnson 46-7)