Windows is the most best operating system

Many operating systems are "old", and many are new. Without specific systems to compare, your question is unanswerable and meaningless.

I'm unsure what you mean by this question, it is not specific enough to answer properly.

If you wanted a comparison of all available operating systems, googling "operating system rundown" or "OS comparison" might yield good results.

i would say it is due to the lack of processing power, memory and storage capabilties of the handheld system in comparison to that of a PC, the Operating system will be comparable to that of older PC operating systems developed for less powerful computers.

Lots of people say that Linux is the best because it wont get so easily overloaded.

Virtual operating system