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