Update of February 21, 2004: The advertisement of which this is a small part appeared in today's newspaper.
Based on this ad and the surprisingly large number of people who've responded so far to the link above, it would appear there's certainly a possibility that P. Board might well mean particle board.
Also, doesn't the word "NO" in the circle with the line through it reverse the meaning? Unless I'm wrong if
you don't agree whether it's not reversed, you won't want to miss not going here.