O (Mongolic)

O is a letter of related and vertically oriented alphabets used to write Mongolic and Tungusic languages.

Mongolian language

Transcribes Chakhar ; Khalkha,, and. Transliterated into Cyrillic with the letter.
Indistinguishable from ', except where ' can be inferred from its context:
* ' is found in medial or final syllables if it's also found syllable-initially.
= the final form used in loanwords, as in '.
= medial form used after the junction in a proper name compound.
Derived from Old Uyghur waw, preceded by an aleph for isolate and initial forms.
Produced with using the Windows Mongolian keyboard layout.
In the Mongolian Unicode block, ' comes after ' and before .