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

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