| 摘要 |
PROBLEM TO BE SOLVED: To obtain a portable information terminal and a balance settling method enabling a user to check his (or her) own balance at the time of applying the purchase of a program. SOLUTION: A bidirectional television 2 performs an application of program purchase in accordance with selection information and returns the purchase information of the program, the user updates his (or her) own balance information in accordance with the purchase information of the program. |
