| 摘要 |
A plurality of data items are stored in a storage medium, and time information of each of the plurality of data items is obtained. In a display window on a display screen, a time axis, having a spiral shape, which includes arrangement positions, each corresponding to a predetermined period of time, is displayed. At each of the arrangement positions, on the time axis, corresponding to time represented by the obtained time information of each of the plurality of data items, information (data icon) representing the corresponding data item is displayed. The display sizes of the data icons are reduced toward the center of the spiral time axis, thereby depth can be expressed.
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