I'm a little confused over these terms which may have already discussed somewhere else. I like to get the right answer. 1) Generally people said Mac vs PC. I find strange as Pc refers to Personal computers. Mac is not? 2) It seems like PC or windows are used interchangably. Which is correct? 3) Isn't OS X also uses windows? I mean the format or style (whatever you call it) also has individual windows that can open, minimise and close? Why they are not called windows? Sorry, I only know how to on/off a laptop.