The Celtic Alphabet is composed of three distinct writing systems: OGAM, DRUID, and ERSE. OGAM is an ancient alphabet used by the Celts in Ireland and Britain, consisting of a series of notches and lines carved into stone or wood. DRUID is a form of writing used by the Druids, an ancient Celtic priesthood, which was written in a script known as Ogham. ERSE is a form of writing used by the Scottish Gaels, which is based on the Latin alphabet. All three of these writing systems were used by the Celts to record their history, literature, and laws.