Intelligent User Interfaces: Past, Present and Future V. López Jaquero, F. Montero, J.P. Molina, P. González Laboratory of User Interfaces and Software Engineering (LoUISE) Instituto de Investigación en Informática (I3A) Universidad de Castilla-La Mancha, 02071 – Albacete (SPAIN) { victor | fmontero | jpmolina | pgonzalez }@dsi.uclm.es 1 Introduction Artificial Intelligence tries to simulate human’s capabilities by means of machines. This challenge, pushed in the world- famous Dartmouth conference in 1956, has focused an enormous amount of interest and effort of the research community in the last 50 years. Although after all these years the community has not been able to achieve to euphoric predictions enunciated at that conference, a good number of milestones in this simulation of human capabilities with machines have been achieved, endorsing the evolution of Artificial Intelligence field. Beyond any doubt, one of the cornerstones of simulating human capabilities is communication. Communication in this situation can be realized between humans, between machines or between humans and machines. Communication between human has been studied for many years in communication theory, communication between machines is still today a hot topic in conferences, with especial emphasis on ontologies and communication acts. Finally, communication between humans and machines is studied in Human-Computer Interaction discipline. This discipline deals with the design, implementation and evaluation of user interfaces.