| 摘要 |
An information selling system, wherein chargeable and no-charge information stored in a CD-ROM is written in different logical formats, and the no-charge information of the CD-ROM mounted on a CD-ROM system (200) is readable by a personal computer (100), and further, the chargeable information of the CD-ROM is made readable by transmitting a password from a telephone reception operation center (300) after its sales contract. |
