19. The computer readable medium of claim 18 , the program instructions further executable by the computer to implement compiling the list of items when an accessing application accesses an item.
19. The computer readable medium of claim 18 , the program instructions further executable by the computer to implement compiling the list of items when an accessing application accesses an item. 20. The computer readable medium of claim 19 , the program instructions further executable by the computer to implement: determining whether an entry for a given item is on the list of items when an accessing application accesses the given item; updating the entry if the given item is on the list of items; and adding an entry to the list of items if the given item is not on the list of items.