O
Unicode subscripts and superscripts
Enclosed Alphanumeric Supplement
Octonion
Fraktur
Ordinal indicator
Enclosed Alphanumerics
Ɵ
Ö
Õ
Ò
Oʻ
Ó
Ǫ
Ơ
Inverted breve
Breve
Mid back rounded vowel
Open O
Ø
O'
O͘
ⱺ
Open-mid back rounded vowel
Ꝍ
Mid front rounded vowel
Ǫ́
Bilabial click
Circumflex
Macron (diacritic)
Nasal vowel
Vietnamese alphabet
Double grave accent
Ogonek
Double acute accent
Diethyl ether
Livonian language
Dot (diacritic)
Finno-Ugric transcription
R-colored vowel
International Phonetic Alphabet
Cedilla
Mid central vowel
Hook above
Scribal abbreviation
Ring (diacritic)
Shift Out and Shift In characters
Nasal bilabial click
Caron
Small caps
O,O′-Diacetyldopamine
P&O
O,O′-Dipivaloyldopamine
O visa
O (disambiguation)
O-methylated flavonoid
O-GlcNAc
O Antiphons
O A e o Z
Douglas O-38
O-Acetylbufotenine
O class
O line
Pui O
O series
O lucenti, o sereni occhi
Big O
Tai O
O Come, O Come, Emmanuel
Ping-O-Tronic
O. Henry Award
Big O notation
O-Pivalylbufotenine
Haplogroup O-M119
O-ring
Yeshe-Ö
O Tannenbaum
O (Cyrillic)
O Tempo e o Vento
Ó Paí, Ó
P&O Cruises
Isoflavone-7-O-beta-glucoside 6"-O-malonyltransferase
O-type star
O le Ao o le Malo
O-demethylpuromycin O-methyltransferase
O-linked glycosylation
P&O Princess Cruises
Daddy-O
Flavonol-3-O-beta-glucoside O-malonyltransferase
Kamen Rider Den-O + Shin-O
Pig-hoo-o-o-o-ey
O-Acetylserine
O-Bi, O-Ba: The End of Civilization
Ó Rothláin
Ó Lochlainn
Google I/O
Cyanidin 3-O-rutinoside 5-O-glucosyltransferase
Vitexin 2"-O-rhamnoside 7-O-methyltransferase
Ó Sé
Asynchronous I/O
Protein O-GlcNAcase
Lycoming O-235
Cyanidin-3-O-glucoside 2-O-glucuronosyltransferase
Delphinidin 3',5'-O-glucosyltransferase
O-type main-sequence star
O scale
Jell-O
Haplogroup O-M268
Memory-mapped I/O and port-mapped I/O
Anthocyanin 3-O-glucoside 6''-O-hydroxycinnamoyltransferase
Tam o' Shanter
Haplogroup O-M175
Anti-streptolysin O
O (German magazine)
Cyrillic O variants
O Silêncio Q Precede O Esporro
HNLMS O 20
THC-O-acetate
Subdwarf O star
Jack-o'-lantern
Handley Page Type O
O... Saya
W/o
P&O Ferries
Continental O-200
Double-O
Yam O
Shibuya O-East
USS O-12
O tempora, o mores!
Séamus Ó Fearghail
Te Pīhopatanga o Te Upoko o Te Ika
Lycoming O-290
Te o Tsunagō/Ai o Utaō
The Big O
Domnall Ó Cuindlis
O-Zone
Anthocyanin 5-O-glucoside 6'''-O-malonyltransferase
USS O-7
'O pere e 'o musso
Te Pīhopatanga o Te Manawa o Te Wheke
Heme O
Páidí Ó Sé
I/O scheduling
Beta-glucogallin O-galloyltransferase
Jell-O Gallery
Ádhamh Ó Cianáin
Beta-glucogallin—tetrakisgalloylglucose O-galloyltransferase
Luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase
Five-O
Man o' war
O, The Oprah Magazine
Ó hUiginn
Ō clan
O-aew
The Marquise of O
Steve O.
Ō-yoroi
Diarmaid Ó Donnchadha
Mícheál Ó Cléirigh
O family
O-Bahn Busway
Antoine Ó Raifteiri
Channel I/O
Punk-O-Rama
Máirtín Ó Direáin
Ō Rissei
8-hydroxyfuranocoumarin 8-O-methyltransferase
Douglas O-2
Tseung Kwan O line
5-O-Methylmyricetin
O 12-class submarine
Doyle O-2 Oriole
Soleil O
Flavanone 7-O-glucoside 2"-O-beta-L-rhamnosyltransferase
Triple-O
O Ta-ryŏn
N-acetylneuraminate 7-O(or 9-O)-acetyltransferase
Lycoming O-435
Five Pointe O
O schöner Mai!
Lycoming O-360
Big O Tires
Cho-Den-O series
USS O-6
Ó Tomhrair
Sunn O)))
Maelbrighte Ó Hussey
Cruise-O-Matic
O with tilde (Cyrillic)
HNLMS O 24
Tomás Ó Fiaich
O salutaris hostia
T and O map
O-Desmethylangolensin
Luteolin-7-O-glucuronide 2"-O-glucuronosyltransferase
5-hydroxyfuranocoumarin 5-O-methyltransferase
Ó hAichir
Yi O
O filii et filiae