Q. What is a limitation of the WYSIWYG paradigm for usability in certain cases?

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Q. What is direct engagement in the context of direct manipulation systems?

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Q. What is the main difference between the direct manipulation paradigm and the language paradigm?

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Q. What is one interpretation of the language paradigm that requires the user to understand the underlying system's structure?

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Q. In the language paradigm, how does the interface handle user requests for information retrieval?

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Q. In the action paradigm, what is a benefit of performing simple tasks using direct manipulation?

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Q. What is one advantage of the language paradigm over the action paradigm for more complicated tasks?

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Q. What is an interesting combination of the action and language paradigms known as?

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Q. What was the name of the innovative information storage and retrieval apparatus described by Vannevar Bush in 1945?

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Q. What was the primary purpose of the memex?

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Q. Who was influenced by Vannevar Bush's ideas behind the memex and coined the term "hypertext" to reflect the non-linear text structure?

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Q. How did Vannevar Bush's memex influence the concept of hypertext?

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Q. How did Ted Nelson's project, Xanadu, differ from the success of hypertext and hypermedia?

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Q. What is a multi-modal interactive system?

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Q. What are the communication channels referred to as in a multi-modal interactive system?

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Q. How do genuine multi-modal systems differ from other interactive systems in terms of communication channels?

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Q. How do humans naturally process information?

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Q. What are some of the core areas of current research in interactive system design?

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Q. What is computer-supported cooperative work (CSCW)?

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Q. What is the main distinction between CSCW systems and interactive systems designed for a single user?

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