1. A CATV system comprising: a center facility for transmitting, together with a television signal carrying a broadcast program, a message directed to a particular terminal apparatus, address data of the particular terminal apparatus, and quantity data indicating a quantity of the message; and a plurality of terminal apparatuses each operable to receive said address data, wherein the address data enables said particular terminal apparatus to display the entire message on an associated TV receiver based on the quantity data and to finish the display of the message when receiving an instruction from a user indicating reception of the entire message.