Definitions and Taxonomies Virtual Reality: total immersion in a virtual world (replacing the physical one) through mechanisms such as HMD, CAVEs etc. Augmented Reality: in the narrow sense of the term, fusion of physical reality with a virtual one (e.g. through sensors, goggles) in order to "enhance" the physical world; in a broader sense, augmentation of the physical reality through virtual components (e.g. Lozano-Hemmer's "Displaced Emperors") Mixed Reality: physical and virtual reality coexist and form a continuous space; see Blast Theory's "Can You See Me Now" (Sheffield Archive) Installation Categories (Joachim Sauter) screen installation environment (immersion) interactive architecture (media facades, architecture as display mechanism) Other models for approaching installation navigational models (emphasis on input devices, movement through a world) distributed models (emphasis on distribution and social interaction) architectural models (emphasis on architectures of the world -- physical or virtual) "Awareness Design" making users aware of invisible / intangible aspects of the environments (see ARCH-OS) Other topics discussed immersion -- from Renaissance and panoramas to virtual reality qualities of virtual vs. physical space -> issues of embodiment (see Peter Anders, "Anthropic Cyberspace") Virtual Reality as flight from the body or "second life"? (see Avatara by 536; The Port) Models of Interaction point-and-click (trigger/response) navigation of media elements in an "informationally closed" system (no modifications possible by the user) contribution of users to a framework established by the artist rewriting of the system by users interaction between software elements (no interaction by users)