I was reviewing Apple Support's Mac 101, Files and Folders Lesson and I noted that compared to some of their screenshot application items (Finder/MacIntosh HD/Applications), I have an empty space where, I assume, application folders where. I have a blank spot (Sorted by Name) after the Address Book (which I think was the AppleScript folder), a blank sport after the DVD Player (which I think was Expose), and a couple others. Where did my application icons go! I still have the Expose feature if I use the mouse, but I'm curious as to why they no longer appear in the folder. Can I, without much trouble, reload all applications from my Snow Leopard upgrade disk? If so, how? My iMac is an early 2009, 24" w/ 2.66Ghz processor. Thank you.