This site may have been posted here before; if so, I apologize to the post-er for not remembering. I do not know the meaning of the 2 labels on the left: Centum, and Satem Languages. Could someone help me out, please?
http://www.georgetown.edu/faculty/ballc/oe/oe-ie.html
Holy cow--if anybody's interested in a discussion board where you write in Old English, follow the links! Yikes.