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What goes into the making of an Operating System?
What are the parts and how do they work?
How do the mobile phones run? I guess they run with an OS?
Where can ASM be applied in the modern world?

I hope you have worked in UNIX? What basic difference do you find between windows and Linux os?

By the way, there is an emulator(Like an os inside an os) called Wine, its a freeware. It runs as a virtual machine inside Linux, allowing you to run Windows applications. *wink wink* This way one can legally run windows applications and not pay Windows a single dime!!