| 摘要 |
PROBLEM TO BE SOLVED: To rapidly acquire adequate information related to a word which appears in an electronic book. SOLUTION: When display of a list of storage information related to a keyword of electronic books is instructed by a user, an update date determination part 128 confirms the update date of storage information. In automatic update setting, an update information acquisition part 129 acquires new information from a server through the Internet, and a storage information update part 130 updates the storage information to new information. In manual update setting, a display control part 121 displays a button for updating storage information the update date of which has expired in the list of storage information. This invention can be applied to the electronic book display device. COPYRIGHT: (C)2007,JPO&INPIT
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