The name Oz may or may not have come from ounces, as this node alludes to (see above). There is a story that L. Frank Baum, when telling the story to a young child, was asked the name of the fantastic place. Frank looked into the next room across, and saw on a filing cabinet the words "A-N" and "O-Z" on it's two drawers. However, this story is slightly patchy, and Frank seemed to have told it 2 different ways. It seems more likely the allegorical theory is correct.