<P> An operating system ( OS ) is system software that manages computer hardware and software resources and provides common services for computer programs . </P>
<P> An operating system ( OS ) is system software that manages computer hardware and software resources and provides common services for computer programs . </P>
what is operating system what is operating system
what is operating system what is operating system
system software that manages computer hardware and software resources and provides common services for computer programs
system software that manages computer hardware and software resources and provides common services for computer programs