| 摘要 |
<P>PROBLEM TO BE SOLVED: To construct a system capable of automatically deleting a user ID of a user who cannot receive a content service in store hours in relation to the store hours and capable of preventing leakage of privacy information of users without requiring manual operations at any store regardless of whether a POS controller is introduced or not. Ž<P>SOLUTION: In the system, a user ID of a user unrestricted to a music piece ID of a music piece capable of being played in store hours is automatically deleted by: comparing a store closing time previously registered by a worker in a store having Karaoke machines with a performance ending time of the music piece registered by the user whose user ID is specified; and dividing the music pieces registered in a booking queue into the music piece capable of being played in the store hours and the music piece incapable of being played in the store hours. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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