Third-wave HCI, 10 years later---participation and sharing

from human factors to human actors." In the second wave, the focus was on groups working with a collection of applications. Theory focused on work settings and interaction within well-established communities of practice. Situated action, distributed cognition, and activity theory were important sources of theoretical reflection, and concepts like context came into focus in the analysis and design of human-computer interaction. Proactive methods, such as a variety of participatory design workshops, prototyping, and contextual inquiries, were added to the toolbox. In the third wave, the use contexts and application