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Incidentally:
I have obtained a (pre-release) version of "kaos",  a software package for SUN workstations from  Swan Kim & John Guckenheimer at Cornell University.

It allows one to numerically solve, visualise and investigate dynamical systems (defined mathematically).  It constructs phase portraits, periodic orbits, Poincare sections, Fourier transforms, Lyapunov exponents, and fractal dimension plots.