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

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