Specifically, evolutionary algorithms applied to grammatical inference; evolutionary algorithms applied to training and optimisation of artificial neural networks; application of evolutionary algorithms and neural networks to the recognition of proteins and DNA; application of techniques based on fuzzy logic for the improvement of the behaviour of genetic algorithms. Design of operators, control of parameters, etc. Genetic algorithms in optimisation problems with imprecise information; application of genetic algorithms to the design and identification of fuzzy systems: adjustment and learning based on fuzzy rules.