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