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

iguation) 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 Big O O Tempo e o Vento Tai O Ping-O-Tronic 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 O (Cyrillic) P&O Princess Cruises