| 摘要 |
PROBLEM TO BE SOLVED: To promote sales of digital data at a charge for the trial use of digital data and to surely collect the charge, when the digital data are used. SOLUTION: A digital data selling system is developed, which is advantageous to both a client and a contents provider by charging for the trial use of the digital data downloaded from a contents provider terminal to a purchaser client terminal through a communication line, enabling the client to purchase the digital data, after confirming the digital data sufficiently, and facilitating the contents provider to expand the sales system of the digital data. |
