O
Unicode subscripts and superscripts
Octonion
Fraktur
Ordinal indicator
Enclosed Alphanumeric Supplement
Enclosed Alphanumerics
Ö
Ɵ
Oʻ
Ó
Õ
Ò
Ơ
Ǫ
Open O
Mid back rounded vowel
O'
Open-mid back rounded vowel
ⱺ
Ø
Inverted breve
Breve
Ǫ́
Ꝍ
Circumflex
Mid front rounded vowel
Bilabial click
O͘
Macron (diacritic)
Vietnamese alphabet
Double acute accent
International Phonetic Alphabet
Dot (diacritic)
Mid central vowel
Ogonek
Hook above
Cedilla
Livonian language
Finno-Ugric transcription
R-colored vowel
Diethyl ether
Shift Out and Shift In characters
Nasal vowel
Scribal abbreviation
Double grave accent
Ring (diacritic)
Nasal bilabial click
Small caps
Caron
O,O′-Diacetyldopamine
P&O
O visa
O (disambiguation)
O,O′-Dipivaloyldopamine
O-methylated flavonoid
O Antiphons
O-GlcNAc
O A e o Z
Douglas O-38
O class
O line
O-Acetylbufotenine
Pui O
O series
O lucenti, o sereni occhi
Big O
Big O notation
Ping-O-Tronic
Tai O
O. Henry Award
O Come, O Come, Emmanuel
O-Pivalylbufotenine
O-ring
Yeshe-Ö
Haplogroup O-M119
O Tannenbaum
Ó Paí, Ó
O (Cyrillic)
O Tempo e o Vento
P&O Cruises
O-type star
P&O Princess Cruises
Isoflavone-7-O-beta-glucoside 6"-O-malonyltransferase
O-linked glycosylation
O le Ao o le Malo
Daddy-O
O-demethylpuromycin O-methyltransferase
Flavonol-3-O-beta-glucoside O-malonyltransferase
Pig-hoo-o-o-o-ey
Kamen Rider Den-O + Shin-O
Ó Rothláin
O-Bi, O-Ba: The End of Civilization
O-Acetylserine
Google I/O
Ó Lochlainn
Ó Sé
Vitexin 2"-O-rhamnoside 7-O-methyltransferase
Protein O-GlcNAcase
Cyanidin 3-O-rutinoside 5-O-glucosyltransferase
Lycoming O-235
Asynchronous I/O
Delphinidin 3',5'-O-glucosyltransferase
Tam o' Shanter
Cyanidin-3-O-glucoside 2-O-glucuronosyltransferase
O-type main-sequence star
Anthocyanin 3-O-glucoside 6''-O-hydroxycinnamoyltransferase
Cyrillic O variants
O tempora, o mores!
Anti-streptolysin O
O (German magazine)
The Big O
Haplogroup O-M268
HNLMS O 20
Haplogroup O-M175
O Silêncio Q Precede O Esporro
O scale
THC-O-acetate
W/o
Subdwarf O star
O... Saya
Memory-mapped I/O and port-mapped I/O
Jack-o'-lantern
Handley Page Type O
Shibuya O-East
Yam O
P&O Ferries
Double-O
Séamus Ó Fearghail
Domnall Ó Cuindlis
O-Bahn Busway
Te Pīhopatanga o Te Upoko o Te Ika
Te o Tsunagō/Ai o Utaō
Douglas O-2
USS O-7
Lycoming O-290
Continental O-200
USS O-12
Punk-O-Rama
'O pere e 'o musso
Heme O
O-Zone
I/O scheduling
Anthocyanin 5-O-glucoside 6'''-O-malonyltransferase
Te Pīhopatanga o Te Manawa o Te Wheke
Jell-O Gallery
Beta-glucogallin O-galloyltransferase
Jell-O
Ō clan
O-aew
Páidí Ó Sé
Beta-glucogallin—tetrakisgalloylglucose O-galloyltransferase
Ádhamh Ó Cianáin
Luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase
Ó hUiginn
Ō-yoroi
O, The Oprah Magazine
Sunn O)))
Five-O
Diarmaid Ó Donnchadha
Man o' war
The Marquise of O
Steve O.
Mícheál Ó Cléirigh
5-O-Methylmyricetin
O family
Channel I/O
Máirtín Ó Direáin
O 12-class submarine
Antoine Ó Raifteiri
Doyle O-2 Oriole
Tseung Kwan O line
Ó Flaithbheartaigh
Ō Rissei
Soleil O
Lycoming O-320
Flavanone 7-O-glucoside 2"-O-beta-L-rhamnosyltransferase
8-hydroxyfuranocoumarin 8-O-methyltransferase
O schöner Mai!
Triple-O
Cho-Den-O series
Five Pointe O
O. O. McIntyre
O with tilde (Cyrillic)
Yi O
N-acetylneuraminate 7-O(or 9-O)-acetyltransferase
Lycoming O-360
O Ta-ryŏn
HNLMS O 24
Big O Tires
USS O-5
USS O-6
Lycoming O-435
Cruise-O-Matic
O-Desmethylangolensin
T and O map
Bit-O-Honey
$O$
Tomás Ó Fiaich
O salutaris hostia