Having been an exclusively Mac user most of my life, and having only recently (during the past few years) started dabbling in PC's and Windows, one of the most obvious differences between Mac OS and Windows is the amount of files in a Windows application folder. I'm curious why there's such a big difference? First of all, Mac applications are rarely in their own folders but exist mostly as single icons in the applications folder. A Windows application will be in the Programs Folder and each application has a folder containing, not only the application icon, but dozens, or more usually, hundreds of other files in the folder as well--to the point where it is often difficult to find the application icon amongst all its numerous compadres. Installation software, as well, is heavily crowded with files for Windows app installations. I'm talking about XP and earlier. I've not had a single experience with Vista yet, so don't know if things have changed with the new Windows. How much of this difference in apparent files amounts is simply in the user interface and how much is it in the architecture of the two OS's? Do Mac applications have a similar amount but they are either hidden or scattered about the system and library? If you took all the preferences and extensions and control panels, etc., associated with a Mac app, would they add up to a similar amount of files as in a Windows app folder--thereby, meaning the difference is mostly just in the user interface? It seems to me there's a more fundamental difference, and I also wonder if a Windows app with all those files at hand makes Windows software more accessible to the user, whether or not he/she's got a clue to what they are all about? Somehow, I'm expecting the term "global" to be part of the explanation. Thanks ahead for any time spent for my education here. I'd expect there are a few others as ignorant as myself, as well, who could fill a classroom.