An infrastructure for flexible, modular, multi-user intelligent interfaces

Multi-user interfaces are generally held to be difficult to write. However, several groups have shown that a good multi-user infrastructure or a toolkit can make the programmer burden more tractable. This paper expands on the theme and describes an infrastructure that supports not only multi-user interfaces but also their interaction with other (non-interface) agents. The idea is to support agent collaboration and to consider an interface to be just another type of agent