Walls at Work: Electronic and Physical Tom Moran, Xerox PARC Abstract Walls are critical elements of the physical workplace, not only for defining space, but also for displaying and working with information. They are prime sites for computationally-supported interaction. The first half of the talk is about our experiences with electronic walls. Tivoli is a pen/gesture-based whiteboard system for large electronic displays. It has served as a platform for exploring many user-interface and meeting-support issues. I'll show a video and discuss the "domain object" meeting tool facility in Tivoli, which integrates many features of Tivoli. I'll reflect on how to fit this kind of technology into work practices, which we have been doing for several years at PARC. In the second half of the talk, I'll back up and consider everyday physical walls in the workplace beyond the dedicated meeting room. I'll discuss how we can use vision technology to capture the work on these walls and integrate it with online work. The ZombieBoard system creates digital images of wall-size whiteboards. The Collaborage system captures and interprets a collaboratively-created collages of physical elements from a large walls. I'll show these in video and discuss the user interface issues in these kinds of systems. Finally (if there is time) I'll reflect on some issues confronting technologies to support the informal activities in a workplace. Biography Tom Moran is a Principal Scientist and the Manager of the Collaborative Systems Area at Xerox PARC, where he has worked since his Ph.D. in computer science from Carnegie Mellon University in 1974. His early work, with Allen Newell and Stu Card, on the theoretical foundations of human-computer interaction culminated in the seminal book, The Psychology of Human-Computer Interaction (1983). He is also the founder and Editor of the journal, Human-Computer Interaction, since 1982. In 1986, he led the creation of the Rank Xerox EuroPARC lab in Cambridge, England, serving as its first Director until 1990. Moran's research has been in two styles: the development of analytic tools and theoretical frameworks in HCI and the design and development of innovative interactive systems. His analytic research, in addition to the psychology of HCI, includes frameworks on the grammar of command languages (1981), task mapping and mental models (1983), design rationale (1991), and embodied user interfaces (1998). His systems design work includes the NoteCards idea-processing hypertext system (1986), the user-tailorable Buttons system (1990), the RAVE media space (1992), the Tivoli electronic whiteboard (1993), multimedia meeting capture and "salvaging" tools (1996), and whiteboard-embedded meeting tools (1998).