Using Johnson and Henderson’s (2002) framework, describe the conceptual models that underlie the design of

Using Johnson and Henderson’s (2002) framework, describe the conceptual models that underlie the design of

an electronic personal calendar found on a personal organizer or handheld computer;
a shared calendar found on the web.

How do they differ and what are the main benefits compared with the equivalent physical artifacts? What new functionality has been provided? What interface metaphors have been used? Do you think new users will have problems understanding how these kinds of interactive calendars work? What aspects of the conceptual model might be confusing?