All the possible OWLS

[L Sanford]

No: HPFGUIDX 125631


<Molley>

I'm trying to figure out what the twelve subjects are in which a Hogworts
student can achieve an OWL.  So far, I have only managed to come up with 11.
Can anyone fill in the blank?  Here is what I have:

1.  Potions
2.  Herbology
3.  Transfiguration
4.  Charms
5.  Defense Against Dark Arts
6.  History of Magic
7.  Care of Magical Creatures
8.  Divination	
9.  Ancient Runes
10. Astrology
11. Arithmancy