A computer is classically formalized as a universal Turing machine.
However over the years a lot of research has focused on the
computational properties of dynamical systems other than Turing
machines, such cellular automata, artificial neural networks,
mirrors systems, etc.
In this talk we review some of the definitions that have been
proposed for Turing universality of various systems, and the
attempts to understand the relation between dynamical and
computational properties of a system.