Mr. Curry defended the agency's response once it learned about the size and potential complexity of J.

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The Internet still generates concerns about technological complexity and about potential security lapses.

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The Japanese findings come after the U.S. National Transportation Safety Board said over the weekend that the battery in the Boston fire had not been overcharged, eliminating a relatively simple potential cause but adding new complexity to the investigation.

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"Potential savers are put off by complexity, " the report says.

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And he committed himself in the coming weeks to taking steps that use the power of his office to help try to bring about changes that will address this problem, recognizing the complexity of the problem and the obstacles to potential solutions to the problem.

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But what I'm really doing is adding a layer of complexity to Windows, which slows Windows down and introduces the potential for more crashes.

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Further, the complexity of wafermaking and a constrained supply of silicon provide high barriers of entry to potential competitors.

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