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

bilabial click Caron Small caps O,O′-Diacetyldopamine P&O O visa O,O′-Dipivaloyldopamine O (disambiguation) O-methylated flavonoid O-GlcNAc O Antiphons O A e o Z Douglas O-38 O-Acetylbufotenine O class O line Pui O O series O lucenti, o sereni occhi Big O Tai O Ping-O-Tronic O Come, O Come, Emmanuel O. Henry Award Big O notation Haplogroup O-M119 O-Pivalylbufotenine O-ring Yeshe-Ö O Tannenbaum O (Cyrillic) Ó Paí, Ó O Tempo e o Vento P&O Cruises Flavanone 7-O-glucosi

de 2"-O-beta-L-rhamnosyltransferase Soleil O N-acetylneuraminate 7-O(or 9-O)-acetyltransferase Lycoming O-360 Triple-O Lycoming O-320 Big O Tires Ó Flaithbheartaigh Cho-Den-O series Yi O Five Pointe O O Ta-ryŏn Lycoming O-435 O schöner Mai! USS O-5 USS O-6 O with tilde (Cyrillic) Bit-O-Honey Maelbrighte Ó Hussey HNLMS O 24 Cruise-O-Matic O. O. McIntyre Tomás Ó Fiaich O salutaris hostia Ó Tomhrair O-Desmethylangolensin