4. DESRIST 2009: Philadelphia, Pennsylvania, USA
- Shirley Gregor: Building theory in the sciences of the artificial.
- Christoph Bartneck: Using the metaphysics of quality to define design science.
- Roel Wieringa: Design science as nested problem solving.
- Andrew S. Gibbons: A theory-based alternative for the design of instruction: functional design.
- Yutaka Yamauchi: Power of peripheral designers: how users learn to design.
- Murali Venkatesh: The constitutive and the instrumental in social design.