| 摘要 |
A portal server (4) is adapted to regard a user (C) of preference information (INCc), which includes the URLs of all the music information pages that a user (A) prefers, as a person having similar preference to the user (A) and then introduce a group of "Japanese Juvenile Song Group", to which the user (C) belongs, to the user (A). As a result, only if the user (A) operates to request for introduction of a group that is in accordance with his preference, then he can receive an introduction of a group that has a high potential for being in accordance with his preference. ® KIPO & WIPO 2007
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