Computer Basic Information
Which of the following is true concerning personal computers?

The electronic spreadsheet has been a primary reason for their popularity
None of these
They decrease the demand for mainframe computers
Their future is not so bright owning to the improved cost-performance ratio of minis and mainframes
They have been most successful in the home

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Computer Basic Information
In MODEMS

A digital signal changes some characteristic of a carrier wave
All of these
Digital signal is amplified
None of these
Several digital signals are multiplexed

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