César A. Collazos received a PhD in science with a mention in computing from the University of Chile, Santiago, Chile, in 2004. He completed postdoctoral stays in the CARL Group (Collaborative Applications Research Laboratory) at the University of Chile (2004) and in the C.H.I.C.O Group (Computer–Human Interaction and Collaboration) at the Universidad Castilla-La Mancha, Spain (2005). His research interests focus on HCI, learning, and collaborative work supported by computers. He is the president of the Colombian Society of Computing and the Human–Computer Interaction Association of Spain.