A somewhat problemantic picture has been floating around recently depicting the so-called "Open Stack":

There is just one problem with it: the dependencies are all wrong. For example, OpenID does not depend on OAuth; both depend on XRDS-Simple, however. That means the stack isn't actually a stack and perhaps a lot more confusing than it needs to be...

What about this instead:

Can we change this *before* too many people pick up this picture as their battly cry? Proposed improvements very much welcome; this is difficult to visualize. Please let me know. And if you can think of a better name for it, that'd be good too. (Just check Google what others think the term means)