Model-driven engineering (MDE) is used frequently for complex systems development in various domains. Although the UML has played a large role in software modeling in both academia and industry, other languages and systems are also used. The 2008 edition of MODELS tutorials covered a wide range of domains in which MDE is applied, including semantic web, real-time distributed and embedded systems, web services, and security. The selection committee reviewing the proposals was formed by the following researchers: - Colin Atkinson, University of Mannheim, Germany; - Xavier Blanc, University Pierre et Marie Curie, France (chair); - Jeff Gray, University of Alabama at Birmingham, USA; - Tom Mens, University of Mons-Hainaut, Belgium; and - Jacques Robin, Universidade Federal de Pernambuco, Brazil. The committee selected nine tutorials which are detailed in the following section.