David Martins de Matos graduated in Electrical and Computer Engineering in 1990 from Instituto Superior Técnico (IST), Lisbon. He received a Masters Degree in Electrical and Computer Engineering in 1995 (from IST), on object-oriented programming in distributed systems. In 2005, he received a Doctor of Engineering Degree in Systems and Computer Science (IST), on automatic natural language generation. He has been teaching since 1993 (on logic and functional programming, object-oriented programming, algorithms and data structures, compiler construction, computer architecture, distributed systems, computer graphics, and natural language processing). He was a researcher at INESC, from 1988 to 2000, in the Distributed Systems, Telematic Services and Systems, and Software Engineering Groups. In 1998 he became a member of the Telematic and Computational Systems Center (IST), until 2001, when he became a member of INESC-ID's newly created Spoken Language Systems Lab (L²F). In the past, he participated in several European and National projects, as well as projects in the private sector (banking and telecommunications industries), both national and international. He is a senior member of the ACM (SIGMM, SIGIR) and of the IEEE (Signal Processing Society, Computer Society, Robotics and Automation Society). He is also a member of the Order of Portuguese Engineers.