Windows (XP 또는 7) is the basic operating system used in businesses and school because it is cheaper, therefore it is 더 많이 widespread and used 더 많이 often than OS X. I personally like OS X 더 많이 though, the 디자인 is better and it's easier to use.
Easily PC, and I hope it stays that way, as long as the computer market is dominated 의해 Windows, hackers and what not will not be motivated to make viruses to penetrate the 사과, 애플 OS-X operating system which is fine 의해 me!