An A to start it off
A may have begun as an Egyptian hieroglyph of an ox head. The first letter of the Phoenician alphabet looks like an A laying on its left side and means ox. The Greeks rotated it 90 degrees clockwise and renamed it alpha. They rotated many letters it is believed because they committed to writing with ink on papyrus instead of carving in stone or wood. Thus certain marks were easier to make going in particular directions.