| 摘要 |
The system includes a memory card, such as flash memory, containing information which would otherwise be published in conventional book form, such as a textbook, wherein the information on the card is in read-only form, and includes security elements for preventing access to the information by an unauthorized device. The system also includes a display device for receiving the memory card, reading the information in the memory card and displaying the information, wherein the display device is a stand-alone system, incapable of being connected to a network or other system so as to prevent transfer or copying of information from the display device.
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