| 摘要 |
Each of client terminals stores a history of users of the other client terminals invited to a predetermined group, and the history has the identification information of the group, topic information of the group and the identification information of the users invited to the group so as to be associated with each other. In a group forming system, the first client terminal of a user who desires restoration of a deleted group transmits an invitation request, which includes topic information of the deleted group, identification information of the deleted group and identification information of the users invited to the deleted group, to the client terminals of the users invited to the deleted group. In a case where the history stored in the terminal includes the same topic information as the topic information indicated in the invitation request and includes the corresponding group of the same identification information as the identification information of the group indicated in the invitation request, the second client terminal that has received the invitation request transmits the invitation request to users, who are not included in the invited users indicated in the invitation request, among the users invited to the corresponding group by the terminal.
|
