1. WHAT ARE THE SPECIFIC LIMITATIONS OF A COMPUTER SYSTEM THAT  
PROVIDES
NO OPERATING SYETEM? WHAT MUST BE DONE TO LOAD AND EXECUTE PROGRAMS?
2.WHAT IS THE ADVANTAGE AND DISADVANTAGE OF PROVIDING THE USER
INTERFACE AS A SPERATE SHELL, RATHER THAN AS AN INTEGRAL PART OF THE
OPERATING SYSTEM.

I suggest you go to your college library and dig out a few of the
dustier computer books they have down there from pre-DOS days (or you
municipal library, if you're doing distance ed).  I knew those old
tomes had to be made useful for something.