I looked this up on wikipedia once. it's...complicated:
(
The Alchemist king of the needlessly complicated,
Fri 22 May 2009, 11:29,
archived)
Good grief!
If it needs a Venn diagram to clarify it, it's evidently way too much for me!
;-)
(
J Peasemould Gruntfuttock Alpha Mike Foxtrot,
Fri 22 May 2009, 11:31,
archived)
crumbs
but good diagram
(
Griffin Saver Something, something, 2006, something.,
Fri 22 May 2009, 11:37,
archived)