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