| 摘要 |
PROBLEM TO BE SOLVED: To facilitate a history check of message transfer with each user of the other party.SOLUTION: A transmission/reception part 32 of each terminal device 14 transmits and receives a message M with the terminal device 14 of a user of the other party. A display control part 36 displays history information (ZA, ZB) on the transmission and reception of the message M with each user of the other party on a display device 26. Concretely, the display control part 36 selectively displays the history information ZA of each user of the other party to whom a reciprocation frequency K using a pair of transmission and reception of the message M by the transmission/reception part 32 as a unit is more than a predetermined value KTH and the history information ZB of each user of the other party to whom the reciprocation frequency K is less than the predetermined value KTH. |
