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It was Vannevar Bush who, in 1945, determined the chief narrative characteristic of multimedia by proposing a mechanical device that operated literally "as we may think." The challenge, as he saw it, was to create a machine that supported the mind's process of free association. Bush noted how ideas tend to evolve in a non-linear, idiosyncratic fashion. His Memex would be a tool that could supplement this aspect of human creativity by organizing its media elements to reflect the dynamics of the mind at play.