| 摘要 |
A method of electronic commerce using an optical disc (10) as a medium of exchange. The optical disc (10) is encoded with data representing a monetary value. The monetary value is reduced by an operator involved in an electronic exchange between a buyer (30) and a seller (20). The optical disc (10) may further be encoded with data representing a second monetary value representing a discount or incentive. The optical disc (10) may further include data representing a consumer product such as music or software.
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