http://www.buildingscience.com/documents/insights/bsi-024-vocabulary
Written by Joseph Lstiburek - the very funny guy with the unpronounceable name.
How clear definitions help clear up what we are doing with vapor barriers, water resistive wraps, etc. etc.
Worth the read and has very understandable graphics.
Very nice find John. He's got that style of writing that gets to the point, without boring you.
Very nice and clear; easy to follow. :D