We all know the stereotypes. Apple�s popular commercials have painted the picture in stark terms: There are two types of people, Mac people and PC people. And if the marketing is to be believed, the former is a hip, sport-coat-and-sneakers-�wearing type of guy who uses his computer for video chatting, music mash-ups and other cool, creative pursuits that starchy, business-suited PC users could never really appreciate unless they tried them on the slick Apple interface. Then again, Windows PC enthusiasts probably think that Mac guy is a smug slacker with an overpriced toy that can�t do any serious computing anyway. Funny thing is, both stereotypes are wrong. With a 7.5 percent market share, Macs are no longer just the computer choice of artists and unemployed writers. (Apple is, in fact, the fourth largest computer manufacturer in the world.) And now, more than ever, the guts of both platforms are remarkably similar. Both types of machines use Intel proc�essors (although some PCs can be configured with processors from AMD). Both buy memory, hard drives and graphics cards from the same small pool of suppliers. The underlying operating systems have distinctly different flavors, but in terms of functionality, Microsoft Windows Vista and Mac OS X Leopard have surprisingly similar built-in multimedia, Internet and productivity applications.