Teams whose members are in close physical proximity often rely on team rooms to serve both as meeting places and repositories of the documents and artifacts that support their projects. TeamRooms is a groupware system that fills the role of a team room for groups whose members can work both co-located and at a distance. Facilities in TeamRooms allow team members to collaborate either in real-time or asynchronously, and to customize their shared electronic space with tools to suit their needs. Unlike many groupware systems, all TeamRooms documents and artifacts are fully persistent.