Computer Basic Information
Communication between computers using standard telephone service

Produces little noise and few disturbances
Requires a change to an anolog signal
Is most efficient
All of these
None of these

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Computer Basic Information
An essential difference between the operating system that runs a typical desktop computer and the operating system that runs a typical PDA is that .......

the desktop computer has an OS whereas a PDA does not.
the desktop OS manages hardware resources whereas the PDA OS does not.
None of these
the desktop OS can run several programs simultaneously whereas the PDA OS cannot.
the desktop OS has a graphical user interface whereas the PDA OS does not.

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