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The “Whiteboards” system is intended to be an electronic equivalent of the whiteboards and corkboards that we have in our offices. A Whiteboard database has similar qualities of storing disparate collections of data and saving their spatial location in a window to help with organization. A Whiteboard database can contain references to arbitrary entities: text files, notes, programs, tools, pictures, etc. Whiteboards runs as an application in the Cedar programming environment developed at the Xerox Palo Alto Research Center.
Donahue et al. (Wed,) studied this question.