Everywhere in computers you see hierarchies.
If they're everywhere, then invest in a tool that edits and displays hierarchies really well.
Jack up the UI of the system, and get the editor/displayer deep in the OS, underneath everything.
And make everything everywhere editable or viewable with the hierarchy editor.
And hierarchy editor is just another term for outliner.
PS: If you want to try one, check out littleoutliner.com.