13. The system according to claim 6 , wherein: the central processing unit is operative to interpret the input data to include selecting more information about the indication of how many chat room members of the first chat room have read the first message posted in the first chat room; and based on the interpretation of the input data, the graphics processing unit is operative to prepare the user interface screen to further include a representation of each of the members of the first chat room and an indication of which of the members of the first chat room have read the first message.
16. The system according to claim 13 , wherein the representations of the members are ordered according to which of the members of the first chat room have read the first message and which of the members of the first chat room have not read the first message.