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

ANSWER DOWNLOAD EXAMIANS APP