Andrei Kolmogorov Chaos Edward Lorenz Chaotic Attractor Alan Turing Michele Henon Jules Henri Poincare Claude Shannon Balthazar Van der Pol Nonlinearity Fractals Communication Theory Benoit Mandelbrot Qualitative Dynamics Kurt Godel Complexity Georg Cantor Rene Thom Bifurcation Complex Systems George Birkhoff Nonlinearity Infinite Sets Santa Fe Institute Catastrophe Theory Dynamic Cellular Automata State Space ENIAC and Complex Systems Tools