A graphic component of the dependent Indic vowel o. The graphic components are the Indic dependent vowels e and ā in many scripts, and this is sometimes acknowledged by Unicode.
A graphic component of the dependent Indic vowel au. The graphic components are the Indic dependent vowels e and ā and asat//athat, a vowel-killing mark normally written above consonants, but written above this vowel in the Burmese script.
A graphic component of some tone marks, e.g. in S'gaw Karen, that has been accepted by Unicode.