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Reports that at last year's Frankfurt Book Fair, the world's book publishers were formally introduced to Sony's first electronic alternative to ink on paper, the Data Discman, known as `DD1' in Japan. Hardware is Sony's; Data is compiled and the compact discs are produced by the giant printers Toppan and Dai Nippon; First standards, then markets; A tour of Toppan's new Media Center in downtown Tokyo; Applications of these new services; Extending definitions; More.