||Clannad Original Soundtrack|
||13 August 2004|
||Key Sounds Label|
TOE was is the fourth track of the second disc of the Clannad Original Soundtrack album. It was released on 13 August 2004.
TOE is an acronym for the theory of everything, a theoretical physics theory which was the subject of Kotomi's and her parents' research. It was used as a background music for the final scene of the episode of the same name.