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Image file creating apparatus and image file reproducing apparatus
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Stereoscopic image display apparatus, text data processing apparatus, program, and storing medium
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Data terminal device providing backup of uniquely existable content data
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Contents utilization system, contents utilization device and contents utilization information storage device
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Content data storage
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Data terminal device that can easily obtain content data again, a program executed in such terminal device, and recording medium recorded with such program
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Device for reproducing data
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Memory card and data distribution system using it
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Data distribution system and recorder for use therein
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Data terminal device providing backup of uniquely existable content data
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Reproduction device stopping reproduction of encrypted content data having encrypted region shorter than predetermined length
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