What is the difference between a back stack and a history stack?

Question

I was checking on how to start an activity with an empty back stack and encountered the android:noHistory attribute. It does what I want but I'm still curious about the term "history stack" being used in the docs of android:noHistory. I didn't notice much to any usage of that term throughout the API Guides (e.g. Tasks and Back Stack), so are there any differences between back stacks and history stacks or are they simply the same thing?

Update

So far there are three terms used in the references:

History stack

Back stack

Activity stack

This question might start to get nitpicky since it seems that they can all be used interchangeably, but I'm still interested to know the differences if any.

Answer 1

Well I feel they all are same

From this http://developer.android.com/guide/topics/manifest/activity-element.html#nohist

android:noHistory
A value of "true" means that the activity will not leave a 
historical trace. It will not remain in the activity stack 
for the task, so the user will not be able to return to it.

So

Historical Trace = Activity Stack (Holding recent Activities) = History Stack

and we all know, that BackStack is the one which holds recent activities.

So, all are pretty much the same thing.