| 摘要 |
A system comprises a database configured to store a presentation, the presentation having a presentation identifier and comprising a sequence of discrete presentation items, a first discrete presentation item of the plurality being associated with first content with first content type and a second discrete presentation item of the sequence being associated with second content of a second content type. A presenter interface is configured to receive viewer identification information identifying a viewer to which the presentation is to be made accessible. An access controller is configured to create an access credential using both the presentation identifier and the viewer identification information, the access credential to enable access to the presentation by a viewer computer system. A tracker configured to generate access history data pertaining to access by the viewer computer system to each of the sequence of discrete presentation items. The presenter interface is further configured to present the access history data to a presenter computer system.
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