Mementos as Document Retrieval Keys
Dekaner writes "The BBC is running a story that BT has demonstrated a scanner that can be used to retrieve digital documents by associating them with a physical object. When the digital files are stored on the server, they are associated with a scanned image of the object, for example a seashell. Later, when the user wants to retrieve the files, the memento is again placed on the scanner. The resulting image is used as the retrieval key."
"He doesn't know how to use the seashells!