This book constitutes the refereed proceedings of the 8th International Conference on
Unconventional Computation UC 2009 held in Ponta Delgada Portugal in September 2009. The 18
revised full papers presented together with 8 invited talks 3 tutorials and 5 posters were
carefully reviewed and selected from 40 submissions. The papers are devoted to all aspects of
unconventional computation ranging from theoretical and experimental aspects to various
applications. Typical topics are: natural computing including quantum cellular molecular
neural and evolutionary computing chaos and dynamical system-based computing and various
proposals for computational mechanisms that go beyond the Turing model.
