Everyone's favorite book is [Chaos JamesGleick]'s [http://www.amazon.com/exec/obidos/tg/detail/-/0670811785/qid=1051302172/sr=12-1/102-1288551-5752145?v=glance&s=books].

A nice class with much material: [http://math.sfsu.edu/goetz/Teaching/math490s03/]

this is kinda interesting and has more information than this wiki (though the wiki could outpace it): [http://hypertextbook.com/chaos/]

disorder is not necessary chaos.

Chaos requires three things (arguably the third follows from the first two, but...)

chaos requires three things:

#elements of regularity (periodic points that are dense)

#elements of unpredictibility (sensitive dependance on initial conditions)

#elements of oneness (dense orbits)

chaos is beautifully ordered.

chaotic systems can be visualized. most people by now have seen pictures of at least the MandelbrotSet.

see also IteratedFunctionSystem

see also PiecewiseIsometry