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

d O (disambiguation) O visa O-GlcNAc O A e o Z O Antiphons Douglas O-38 O class Pui O O-Acetylbufotenine O series O line O lucenti, o sereni occhi Big O O. Henry Award Ping-O-Tronic Tai O Big O notation O Come, O Come, Emmanuel O-ring O-Pivalylbufotenine Haplogroup O-M119 O Tannenbaum Ó Paí, Ó Yeshe-Ö O Tempo e o Vento P&O Cruises Ó Rothláin O-type star P&O Princess Cruises O (Cyrillic) O le Ao o le Malo O-linked

glycosylation Flavanone 7-O-glucoside 2"-O-beta-L-rhamnosyltransferase Ō Rissei O. O. McIntyre Soleil O Ó Flaithbheartaigh 8-hydroxyfuranocoumarin 8-O-methyltransferase Lycoming O-320 Doyle O-2 Oriole O with tilde (Cyrillic) Triple-O Five Pointe O Lycoming O-360 Cho-Den-O series N-acetylneuraminate 7-O(or 9-O)-acetyltransferase USS O-6 Yi O Laugh-O-Gram Studio O Ta-ryŏn O schöner Mai! Big O Tires Lycoming O-435 O-Desmethylangolensin USS O-5 HNLMS O 24 O with macron (Cyrillic) O gaúcho Bit-O-Honey Cruise-O-Matic