The appearance of the IBM PC in $1981$ is usually considered the beginning of the PC era because this machine was the first to be widely adopted by businesses. At first using the DOS operating system, a text$-$based command language, and later the Microsoft Windows operating system became the standard desktop personal computer.

Which of the following has been a major threat to the Wintel dominance as a computer platform in recent years?

ANSWER

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Use of personal desktop productivity software tools

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Personal computers functioning as stand$-$alone systems

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Increasing iPhone and Android device sales

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Existence of mainframe computers