Annotation and visualization
AR could be used to annotate objects and environments with public or private information. Applications using public information assume the availability of public databases to draw upon. For example, a hand-held display could provide information about the contents of library shelves as the user walks around the library. At the European Computer-Industry Research Centre (ECRC), a user can point at parts of an engine model and the AR system displays the name of the part that is being pointed at. Figure 7 shows this, where the user points at the exhaust manifold on an engine model and the label "exhaust manifold" appears.