Descriptive and theoretical research in the areas of Phonetics and Phonology, Morphology, Syntax, Semantics, Pragmatics and Discourse Structure, as well as the computational strategies involved in processing them (symbolic versus statistical approaches, finite state automata, context-free and mildly-context sensitive grammars, recent advances in Categorial Grammar, Unification Grammars, Constraint-based systems, computational techniques for speech processing...).