O Unicode subscripts and superscripts Octonion Fraktur Ordinal indicator Enclosed Alphanumeric Supplement Enclosed Alphanumerics Ö Ɵ Ó Ò Oʻ Ǫ Ơ Õ Mid back rounded vowel Open O Open-mid back rounded vowel O' ⱺ Ø Inverted breve Breve Ǫ́ O͘ Mid front rounded vowel Bilabial click Ꝍ Dot (diacritic) Vietnamese alphabet Livonian language Macron (diacritic) Double acute accent Hook above Mid central vowel Double grave accent Ogonek Shift Out and Shift In characters Cedilla Scribal abbreviation Diethyl ether Uralic Phonetic Alphabet Nasal vowel R-colored vowel Ring (diacritic) Circumflex Nasal bilabial click Small caps Caron International Phonetic Alphabet P&O O-methylated flavonoid O visa O (disambiguation) O …

A e o Z O-GlcNAc O Antiphons Douglas O-38 O class Pui O O line O series O lucenti, o sereni occhi O Tempo e o Vento Big O Ping-O-Tronic Tai O O. Henry Award O Come, O Come, Emmanuel Big O notation O-ring Haplogroup O-M119 O Tannenbaum Yeshe-Ö Ó Paí, Ó O le Ao o le Malo O-type star P&O Princess Cruises O (Cyrillic) Ó Rothláin P&O Cruises