Pieter Vermaas studied theoretical physics at the University of Amsterdam and gained a doctorate from Utrecht University on the philosophy of quantum mechanics. Since 1998, he has been affiliated to the Department of Philosophy at Delft University of Technology where he is doing research into the principles of technology. His subjects of interest within that field are the analysis of the concept of technical function as used within engineering, and the description of designing as given by the various design methodologies. Pieter Vermaas studied theoretical physics at the University of Amsterdam and gained a doctorate from Utrecht University on the philosophy of quantum mechanics. Since 1998, he has been affiliated to the Department of Philosophy at Delft University of Technology where he is doing research into the principles of technology. His subjects of interest within that field are the analysis of the concept of technical function as used within engineering, and the description ofdesigning as given by the various design methodologies. Ibo van de Poel is associate professor in ethics and technology at Delft University of Technology. He studied philosophy of science, technology and society at Twente University, where he did a PhD in science and technology studies. He teaches engineering ethics and does research into design and values, the moral acceptability of technological risks, responsibility in research and development networks, the ethics of new emerging technologies, and the notion of technology as a form of social experimentation. Maarten Franssen has degrees in theoretical physics and history and obtained a doctorate in philosophy on issues in the foundations of the social sciences. He joined the Department of Philosophy at Delft University of Technology in 1996. His main areas of research are conceptions of normativity and rationality in general, the application of rational decision-making methods in scientific and technical research, and the formal description of artefacts and systems in technology. Wybo Houkes is a senior lecturer in the Philosophy of Science and Technology Department at Eindhoven University of Technology. He studied theoretical physics in Amsterdam and philosophy in Leiden, where gained his doctorate on Kantianism in early 20th century philosophy. He is currently conducting research into the tension between universal Darwinism and more tailor-made approaches in evolutionary theories of technology, the role of agency in these theories, and into the nature of technological knowledge and the functions of technical artefacts.

Technical Artefacts.- Technical Designing.- Ethics and Designing.- Technological Knowledge.- Sociotechnical Systems.- The Role of Social Factors in Technological Development.- Ethics and Unintended Consequences of Technology.