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

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

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