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