Shared spaces

We review current spatial approaches to CSCW (mediaspaces, spatial video conferencing, collaborative virtual environments and telepresence) and classify them along the proposed dimensions of transportation, artificiality and spatiality. This classification leads us to identify new shared space application so called mixed realities. We present an example of a mixed reality called the Internet Foyer, an application which provides a unified entry point into an organisation's physical and electronic environments and which supports awareness and chance encounters between the occupants of physical and synthetic space.