The Proceedings of the ACM on Human Computer Interaction (HCI) is a journal series for research relevant to multiple aspects of the intersection between human factors and computing systems. Characteristics of humans from individual cognition, to group effects, to societal impacts shape and are shaped by computing systems. Human and computer interactions affect multiple aspects of daily life, shape mass social changes, and guide novel computing experiences. These interactions are studied via multiple methods, including ethnography, surveys, experiments, and system implementation among others. PACMHCI covers a broad range of topics and methods that help illuminate the intersection between humans and computing systems. The scope of this journal includes research contributions in new systems for input and output, studies of user experiences with computing systems, scholarship on the individual and group effects of computer mediation, and societal impacts of new human computer interactions. PACMHCI also welcomes contributions on new methodologies, tools, theories and models, as well as visionary and survey papers that help advance the field.