What are the tecnical differences between P.C (windows) and Apple (Mac)?

The only difference between them is the Operating System (OS). Mac uses a Linux based system (i believe) and Windows uses something completely different. Mac OS is a bit more secure in its creation whereas Microsoft left a lot of holes in their programming. That isn't to say that Macs can't get viruses though. Also, Windows based PC's cannot run Mac OSX....something about the configuration, you'll have to research that....but Macs are able to run Windows through Bootcamp or another program of the like.