Q. What has been the key to increased usability in interactive systems as technology has advanced?

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Q. What were the significant advances in computing in the 1940s and 1950s?

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Q. What was the major contribution that came out of the emphasis on research into human-centered applications of computer technology?

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Q. How did time-sharing systems of the 1960s differ from previous computing systems?

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Q. How did time sharing affect human-computer interaction?

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Q. What did time sharing replace in the field of programming?

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Q. What were researchers experimenting with in the mid-1950s regarding computer information presentation?

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Q. Which military project of the US Air Force was one of the earliest applications of display screen images?

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Q. Who astonished the established computer science community with the Sketchpad program at MIT in 1962?

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Q. Besides creating visual displays, what was Sketchpad's role as a simulation language?

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Q. What was one of the important ideas demonstrated by Sketchpad?

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Q. How did Sketchpad enhance human interaction with the computer?

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Q. What did Sutherland's efforts with Sketchpad demonstrate regarding the history of computing?

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Q. When was the live demonstration of Douglas Engelbart's oNLine System (NLS) given?

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Q. What is bootstrapping in the context of computing?

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Q. Why did Engelbart's team of programmers concentrate on developing programming tools?

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Q. What is the advantage of using programming toolkits in computing?

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Q. What was the focus of increasing the usability of computing technology with the advent of personal computing?

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Q. Why is it essential for a personal computer system to be flexible in its ability to 'change the topic' during a user-computer dialogue?

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Q. What is one presentation mechanism for achieving dialog partitioning and separating different logical threads of user-computer conversation on the display device?

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