Scott Robertson is a professor in the Information and Computer Sciences Department at the University of Hawai'i at Mānoa, where he currently serves as Department Chair. His academic background is thoroughly interdisciplinary, with an undergraduate degree in Social Science, a Master's degree in Cognitive Psychology, and a Ph.D. from a formative Cognitive Science program that combined psychology and AI. His early work was in the area of natural language processing, but he took a turn toward HCI after spending some time at IBM Watson Research Center. He has served as co-chair of the ACM Human Factors in Computing (CHI) conference (1995), the Digital Government Society conference (2014), and the EPIC Ethnographers in Industry conference (2018). His most recent research has been in the area of information and communications technologies as they influence civic engagement, focusing especially on social media and deliberation. John M. Carroll is Distinguished Professor of Information Sciences and Technology at Penn State University, and was a founder of human-computer interaction. He served on the program committee of the 1982 Bureau of Standards Conference on the Human Factors of Computing Systems that in effect inaugurated the field and was the direct predecessor of the field's flagship conference series, the ACM CHI Conferences. Through the past two decades, Carroll has been a leader in the development of the field of Human-Computer Interaction. In 1984 he founded the User Interface Institute at the IBM Thomas J.Watson Research Center, the most influential corporate research laboratory during the latter 1980s. In the 1994, he joined Virginia Tech as Department Head of Computer Science where in 1995 he led the effort to form the university's Center for Human-Computer Interaction. That year, Virginia Tech was invited to join the Human-Computer Interaction Consortium, a group of the leading corporate and academic HCI research organizations in the world. He has written more than 250 technical papers, more than 25 conference plenary addresses, and 13 books, including HCI Models, Theories, and Frameworks, and Usability Engineering (with Mary Beth Rosson). He serves on 10 editorial boards for journals and handbooks, and is the current editor-in-chief of ACM Transactions on Computer- Human Interaction (ToCHI). He has won the Rigo Career Achievement Award from ACM (SIGDOC), received the Silver Core Award from IFIP, and is a member of the CHI Academy. In 2003 he became the fifth recipient of the CHI Lifetime Achievement Award, the most prestigious research award in HCI.