| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of retrieval without substantially increasing user's load. SOLUTION: A retrieval device 6 includes a retrieval log acquisition unit 11, a control unit 13, and a list display 15. In this time's retrieval when a user and a retrieval word are the same as those in the past retrieval, an information provision site which has not received access corresponding to the operation of the user in the past retrieval result list is removed, and displayed as this time's retrieval result list. Thus, it is possible to reflect the use situations of the retrieval results in the past retrieval. COPYRIGHT: (C)2010,JPO&INPIT
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