O gauge

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

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

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