I apologize that this isn't a question on how to use Mathematica, but rather where the documentation lies inside the applications folder.
During a drag and drop, I happened to drag the Mathematica symbol on the help window (on a Mac) onto the desktop, which just ended up dragging the help file onto the desktop. Now, I don't know where in the applications folder folder that file belongs (file name: Mathematica.nb) so that I can place it back and my help won't start because the file isn't where it is looking. My best guess is somewhere in /Applications/Mathematica/Documentation/, but theres tonnes of folders in there. Could someone check in their folder and let me know where this file belongs (again, I'm on a Mac)?
In[70]:= FileNames["Mathematica.nb", $InstallationDirectory, Infinity]
Out[70]= {"C:\\Program Files\\Wolfram \
Research\\Mathematica\\8.0.1\\Documentation\\English\\System\\Guides\\\
Mathematica.nb", "C:\\Program Files\\Wolfram \
Research\\Mathematica\\8.0.1\\Documentation\\English\\System\\\
ReferencePages\\Programs\\Mathematica.nb"}
You want the first one, in Documentation/English/System/Guides.