O, Unicode subscripts and superscripts, Octonion, Fraktur, Ordinal indicator, Enclosed Alphanumeric Supplement, Enclosed Alphanumerics, Ɵ, Ò, Ö, Ǫ, Oʻ, Ơ, Mid back rounded vowel, Ó, Õ, Open O, O', O͘, Inverted breve, Ǫ́, ⱺ, Breve, Mid front rounded vowel, Ø, Bilabial click, Circumflex, Open-mid back rounded vowel, Ꝍ, Nasal vowel, Dot (diacritic), Double grave accent, Livonian language, Mid central vowel, Double acute accent, International Phonetic Alphabet, Hook above, Vietnamese alphabet, Macron (diacritic), Cedilla, Ogonek

Shift Out and Shift In characters, Diethyl ether, Finno-Ugric transcription, Open back rounded vowel, R-colored vowel, Scribal abbreviation, Ring (diacritic), Small caps, Nasal bilabial click, Caron, O,O′-Diacetyldopamine, P&O, O visa, O (disambiguation), O-methylated flavonoid, O,O′-Dipivaloyldopamine, O-GlcNAc, O A e o Z, O Antiphons, Douglas O-38, O-Methylnordehydrobufotenine, O-Acetylbufotenine, O class, O-Pivalylbufotenine, O line, O series, O lucenti, o sereni occhi, Pui O, O. Henry Award, Big O notation, Big O, Ping-O-Tronic, O-ring, O Come, O Come, Emmanuel, Tai O, O (Cyrillic), Haplogroup O-M119, O Tannenbaum, O Tempo e o Vento, Ó Paí, Ó, O-type star, P&O Cruises, O-linked glycosylation, P&O Princess Cruises, Isoflavone-7-O-beta-glucoside 6"-O-malonyltransferase, O-demethylpuromycin O-methyltransferase, Flavonol-3-O-beta-glucoside O-malonyltransferase, Pig-hoo-o-o-o-ey, Kamen Rider Den-O + Shin-O, O-Bi, O-Ba: The End of Civilization

O, Unicode subscripts and superscripts, Octonion, Fraktur, Ordinal indicator, Enclosed Alphanumeric Supplement, Enclosed Alphanumerics, Ɵ, Ò, Ö, Ǫ, Oʻ, Ơ, Mid back rounded vowel, Ó, Õ, Open O, O', O͘, Inverted breve, Ǫ́, ⱺ, Breve, Mid front rounded vowel, Ø, Bilabial click, Circumflex, Open-mid back rounded vowel, Ꝍ, Nasal vowel, Dot (diacritic), Double grave accent, Livonian language, Mid central vowel, Double acute accent, International Phonetic Alphabet, Hook above, Vietnamese alphabet, Macron (diacritic), Cedilla, Ogonek, Shift Out and Shift In characters, Diethyl ether, Finno-Ugric transcription, Open back rounded vowel, R-colored vowel, Scribal abbreviation, Ring (diacritic), Small caps, Nasal bilabial click, Caron, O,O′-Diacetyldopamine, P&O, O visa, O (disambiguation), O-methylated flavonoid, O,O′-Dipivaloyldopamine, O-GlcNAc, O A e o Z, O Antiphons, Douglas O-38, O-Methylnordehydrobufotenine, O-Acetylbufotenine, O class, O-Pivalylbufotenine, O line, O series, O lucenti, o sereni occhi, Pui O, O. Henry Award, Big O notation, Big O, Ping-O-Tronic, O-ring, O Come, O Come, Emmanuel, Tai O, O (Cyrillic), Haplogroup O-M119, O Tannenbaum, O Tempo e o Vento, Ó Paí, Ó, O-type star, P&O Cruises, O-linked glycosylation, P&O Princess Cruises, Isoflavone-7-O-beta-glucoside 6"-O-malonyltransferase, O-demethylpuromycin O-methyltransferase, Flavonol-3-O-beta-glucoside O-malonyltransferase, Pig-hoo-o-o-o-ey, Kamen Rider Den-O + Shin-O, O-Bi, O-Ba: The End of Civilization, Google I/O, Ó Rothláin, Daddy-O, Ó Sé, O-Acetylserine, Vitexin 2"-O-rhamnoside 7-O-methyltransferase, Protein O-GlcNAcase, Ó Lochlainn, Lycoming O-235, Delphinidin 3',5'-O-glucosyltransferase, Cyanidin 3-O-rutinoside 5-O-glucosyltransferase, Asynchronous I/O, 'O pere e 'o musso, O Taryŏn, Tam o' Shanter, Anthocyanin 3-O-glucoside 6''-O-hydroxycinnamoyltransferase, Cyanidin-3-O-glucoside 2-O-glucuronosyltransferase, Cyrillic O variants, O le Ao o le Malo, THC-O-acetate, Mícheál Ó Cléirigh, O scale, O (German magazine), Anti-streptolysin O, O-type main-sequence star, Yeshe-Ö, HNLMS O 20, Haplogroup O-M175, The Big O, W/o, Subdwarf O star, Handley Page Type O, Memory-mapped I/O and port-mapped I/O, O tempora, o mores!, O... Saya, Jack-o'-lantern, Shibuya O-East, Lycoming O-290, Bit-O-Honey, Te Pīhopatanga o Te Upoko o Te Ika, Double-O, Yam O, P&O Ferries, Séamus Ó Fearghail, Domnall Ó Cuindlis, Punk-O-Rama, O Silêncio Q Precede O Esporro, Continental O-200, O‑Level, USS O-7, Heme O, USS O-12, Te Pīhopatanga o Te Manawa o Te Wheke, O-Zone, I/O scheduling, Beta-glucogallin O-galloyltransferase, Ō clan, Anthocyanin 5-O-glucoside 6'''-O-malonyltransferase, O-aew, Douglas O-2