O
Unicode subscripts and superscripts
Enclosed Alphanumeric Supplement
Octonion
Fraktur
Ordinal indicator
Enclosed Alphanumerics
Ö
Ɵ
Ǫ
Ơ
Ò
Oʻ
Õ
Mid back rounded vowel
Ó
Open O
Inverted breve
O͘
O'
Open-mid back rounded vowel
Mid front rounded vowel
ⱺ
Breve
Ꝍ
Ø
Ǫ́
Circumflex
Nasal vowel
Bilabial click
Double grave accent
Dot (diacritic)
Double acute accent
Macron (diacritic)
Hook above
Vietnamese alphabet
Diethyl ether
Cedilla
International Phonetic Alphabet
Livonian language
Shift Out and Shift In characters
Mid central vowel
R-colored vowel
Ogonek
Finno-Ugric transcription
Scribal abbreviation
Small caps
Ring (diacritic)
Nasal bilabial click
Caron
O,O′-Diacetyldopamine
P&O
O,O′-Dipivaloyldopamine
O (disambiguation)
O visa
O-methylated flavonoid
O-GlcNAc
O A e o Z
O Antiphons
Douglas O-38
O class
O-Acetylbufotenine
O line
Pui O
O series
O lucenti, o sereni occhi
Big O
O. Henry Award
O (Cyrillic)
Tai O
O Come, O Come, Emmanuel
Ping-O-Tronic
Big O notation
O-Pivalylbufotenine
Haplogroup O-M119
O-ring
Yeshe-Ö
O Tannenbaum
Ó Paí, Ó
O Tempo e o Vento
P&O Cruises
O-type star
P&O Princess Cruises
Isoflavone-7-O-beta-glucoside 6"-O-malonyltransferase
Flavonol-3-O-beta-glucoside O-malonyltransferase
Ó Rothláin
O le Ao o le Malo
O-linked glycosylation
O-demethylpuromycin O-methyltransferase
Kamen Rider Den-O + Shin-O
Daddy-O
Pig-hoo-o-o-o-ey
O-Acetylserine
O-Bi, O-Ba: The End of Civilization
Ó Lochlainn
Protein O-GlcNAcase
O-type main-sequence star
Ó Sé
Vitexin 2"-O-rhamnoside 7-O-methyltransferase
Cyanidin 3-O-rutinoside 5-O-glucosyltransferase
Google I/O
Lycoming O-235
Asynchronous I/O
Delphinidin 3',5'-O-glucosyltransferase
Tam o' Shanter
Anti-streptolysin O
Cyanidin-3-O-glucoside 2-O-glucuronosyltransferase
Anthocyanin 3-O-glucoside 6''-O-hydroxycinnamoyltransferase
HNLMS O 20
Cyrillic O variants
The Big O
Jell-O
Haplogroup O-M268
O scale
Haplogroup O-M175
O tempora, o mores!
O Silêncio Q Precede O Esporro
Memory-mapped I/O and port-mapped I/O
THC-O-acetate
O (German magazine)
W/o
Subdwarf O star
Shibuya O-East
O... Saya
Jack-o'-lantern
Yam O
Handley Page Type O
Te Pīhopatanga o Te Upoko o Te Ika
Double-O
Te o Tsunagō/Ai o Utaō
P&O Ferries
Séamus Ó Fearghail
I/O scheduling
'O pere e 'o musso
Lycoming O-290
Domnall Ó Cuindlis
Continental O-200
O-Zone
USS O-12
Te Pīhopatanga o Te Manawa o Te Wheke
Punk-O-Rama
O-Bahn Busway
Heme O
USS O-7
Anthocyanin 5-O-glucoside 6'''-O-malonyltransferase
Jell-O Gallery
Ō clan
Beta-glucogallin O-galloyltransferase
O-aew
Douglas O-2
Páidí Ó Sé
Ádhamh Ó Cianáin
Beta-glucogallin—tetrakisgalloylglucose O-galloyltransferase
Ō-yoroi
Five-O
Luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase
Man o' war
Ó hUiginn
The Marquise of O
Steve O.
O, The Oprah Magazine
Diarmaid Ó Donnchadha
Sunn O)))
Mícheál Ó Cléirigh
O family
5-O-Methylmyricetin
Tseung Kwan O line
Antoine Ó Raifteiri
O 12-class submarine
Máirtín Ó Direáin
Channel I/O
8-hydroxyfuranocoumarin 8-O-methyltransferase
Ō Rissei
Doyle O-2 Oriole
Flavanone 7-O-glucoside 2"-O-beta-L-rhamnosyltransferase
Cho-Den-O series
Lycoming O-320
Triple-O
Soleil O
N-acetylneuraminate 7-O(or 9-O)-acetyltransferase
Lycoming O-360
Yi O
O. O. McIntyre
O with tilde (Cyrillic)
Big O Tires
O Ta-ryŏn
Ó Flaithbheartaigh
O schöner Mai!
Five Pointe O
Laugh-O-Gram Studio
O with macron (Cyrillic)
USS O-5
Lycoming O-435
Cruise-O-Matic
HNLMS O 24
Tomás Ó Fiaich
Bit-O-Honey
O Tú o Ninguna
O-Desmethylangolensin
USS O-6