From: ldo@nz.invalid   
      
   Emacs is the world’s most powerful editor.   
      
   Note I didn’t say “text editor”. Emacs can be used to edit binary files,   
   too. It doesn’t assume that a file is made up of “lines”.   
      
   Current versions of Emacs even have the basics of a GUI toolkit built in.   
   You can attach “overlays” to parts of your buffer contents, which modify   
   or even completely replace the way those contents are displayed.   
      
   For example, I wrote expand/collapse commands which selectively show/hide   
   parts of the buffer contents.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)