| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily search for information which many users are currently interested in. Ž<P>SOLUTION: Each time when a user performs search based on a keyword 6a and selects an optional content 7b from a search result 6b, a storage means 1a stores the search keyword 6a and the selected content 7b in association with each other in a storage means 1b. A grouping means 1c determines relevancy between keywords stored in the storage means 1b based on the correspondence between the keyword and selected content, and groups a plurality of relevant keywords. When an optional typical keyword 8a is selected, a relevant keyword output means 1d outputs other relevant keywords 8b belonging to the same group as the selected typical keyword 8a. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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