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

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