So the diagram explains the UX, user experience, idea. There was a time I could not get what do people mean by UX (user experience) and UI (user interface). Some designers would call theirselves UI/UX designer so I thought both are the same. Until I came across about UX in About Face 3 book.
I could no longer remember the exact explanation of the diagram but the gist is that UX (user experience) is a combination of Form, which I think is the UI (user interface), Content, and behavior (interaction designers).
Anyhoo, I just posted this to keep a record of this diagram before I lost it in my 101 archives of files.
There is also a good discussion about this, difference between UX and UI, on quora here >>.
So now at least we'll not get confused as to what to put under our name. =)