Visa källa för O

{{Bokstav
|versal           = O
|gemen            = o

|feniciskt        = [[Fil:Phoenician_ayin.svg|15px]] (ʼayin)
|protokanaiskt    = 
|betydelse        = öga
|arabiskt         = 
|syriskt          = 
|hebreiskt        = 
|arameiskt        = 
|grekiskt         = Οο ([[Omikron]])
|kyrilliskt       = [[О|Оо]]
|övriga_besläktade= 
|brahmi           = 
|gujarati         = 
|devangari        = 
|tibetanskt       = 

|morse            = {{Morse/O}}
|latin-1          = 79
|latin-1-gemen    = 111
|unicode          = U+004F
|unicode-gemen    = U+006F
|bokstavering     = Olof/Oscar

|varianter        = 
}}
'''O''' {{Ljud|Close back rounded vowel.ogg|[uː]}} är den femtonde [[bokstav]]en i det [[Latinska alfabetet#Moderna latinska alfabetet|moderna latinska alfabetet]]. [[Bokstavering]]snamnet är Olle.

== Betydelser ==
=== Versalt O ===
* [[Länsbokstav]] för [[Västra Götalands län]] (tidigare för [[Göteborgs och Bohus län]]).
* [[Kemiskt tecken]] för [[grundämne]]t [[syre]]. Se även [[periodiska systemet]].
* Inom bibliotekens klassifikationssystem [[SAB:s klassifikationssystem|SAB]] är O signum för [[Samhälle (sociologi)|samhälle]], se [[SAB:O]].
* Förkortning för [[väderstreck]]et Ost.

== Historia ==
[[Fil:Omicron uc lc.svg|100px|miniatyr|Omikron.]]
Till det [[latinska alfabetet]] kom bokstaven '''O''' från den grekiska bokstaven [[omikron]], som i sin tur härstammar från den feniciska bokstaven "ayin", vilken ursprungligen föreställde ett öga.

== Datateknik ==
I datorer lagras O samt förkomponerade bokstäver med O som bas och vissa andra varianter av O med följande kodpunkter:
{| table class="wikitable sortable"
! [[Unicode]] !! Gemen !! !! Unicode !! Versal !! !! Används bl.a. i följande språk
|-
|  U+006F  ||style=" font-size: 140%; line-height: 180%;" |   o  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O  ||  U+004F  ||style=" font-size: 140%; line-height: 180%;" |   O  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O  ||   de flesta där latinskt alfabet används
|-
|  U+1D52  ||style=" font-size: 140%; line-height: 180%;" |   ᵒ  ||style="font-size: 60%; line-height: 170%;" |   MODIFIER LETTER SMALL O || || || || (inte att förväxla med U+00B0 (°) DEGREE SIGN)
|-
|  U+00BA  ||style=" font-size: 140%; line-height: 180%;" |   º  ||style="font-size: 60%; line-height: 170%;" |   MASCULINE ORDINAL INDICATOR || || || || (egentligen samma som U+1D52, se föregående rad, men denna är ibland understruken) Förkortning av ordningstal i bl.a. italienska, spanska.<ref>Se [[:en:Ordinal indicator]]</ref>
|-
|  U+00F3  ||style=" font-size: 140%; line-height: 180%;" |   ó  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH ACUTE  ||  U+00D3  ||style=" font-size: 140%; line-height: 180%;" |   Ó  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH ACUTE  ||   [[norska]], [[isländska]], [[färöiska]], [[pinyin]], [[spanska]], [[portugisiska]], [[polska]], [[slovakiska]], [[ungerska]], [[högsorbiska]], [[iriska]], [[italienska]], [[kasjubiska]], [[katalanska]], [[walesiska]], [[occitanska]]
|-
|  U+00F2  ||style=" font-size: 140%; line-height: 180%;" |   ò  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH GRAVE  ||  U+00D2  ||style=" font-size: 140%; line-height: 180%;" |   Ò  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH GRAVE  ||   [[norska]], [[italienska]], [[pinyin]], [[kasjubiska]], [[katalanska]], [[occitanska]], [[portugisiska]], [[rätromanska]]
|-
|  U+014F  ||style=" font-size: 140%; line-height: 180%;" |   ŏ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH BREVE  ||  U+014E  ||style=" font-size: 140%; line-height: 180%;" |   Ŏ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH BREVE ||
|-
|  U+00F4  ||style=" font-size: 140%; line-height: 180%;" |   ô  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH CIRCUMFLEX  ||  U+00D4  ||style=" font-size: 140%; line-height: 180%;" |   Ô  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH CIRCUMFLEX  ||   [[norska]], [[franska]], [[slovakiska]], [[frisiska]], [[kasjubiska]], [[walesiska]], [[portugisiska]]
|-
|  U+1ED1  ||style=" font-size: 140%; line-height: 180%;" |   ố  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH CIRCUMFLEX AND ACUTE  ||  U+1ED0  ||style=" font-size: 140%; line-height: 180%;" |   Ố  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH CIRCUMFLEX AND ACUTE  ||   [[vietnamesiska]]
|-
|  U+1ED3  ||style=" font-size: 140%; line-height: 180%;" |   ồ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH CIRCUMFLEX AND GRAVE  ||  U+1ED2  ||style=" font-size: 140%; line-height: 180%;" |   Ồ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH CIRCUMFLEX AND GRAVE  ||   [[vietnamesiska]]
|-
|  U+1ED7  ||style=" font-size: 140%; line-height: 180%;" |   ỗ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH CIRCUMFLEX AND TILDE  ||  U+1ED6  ||style=" font-size: 140%; line-height: 180%;" |   Ỗ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH CIRCUMFLEX AND TILDE  ||   [[vietnamesiska]]
|-
|  U+1ED5  ||style=" font-size: 140%; line-height: 180%;" |   ổ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH CIRCUMFLEX AND HOOK ABOVE  ||  U+1ED4  ||style=" font-size: 140%; line-height: 180%;" |   Ổ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH CIRCUMFLEX AND HOOK ABOVE  ||   [[vietnamesiska]]
|-
|  U+01D2  ||style=" font-size: 140%; line-height: 180%;" |   ǒ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH CARON  ||  U+01D1  ||style=" font-size: 140%; line-height: 180%;" |   Ǒ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH CARON  ||   [[pinyin]]
|-
|  U+00F6  ||style=" font-size: 140%; line-height: 180%;" |   [[ö]]  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH DIAERESIS  ||  U+00D6  ||style=" font-size: 140%; line-height: 180%;" |   Ö  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH DIAERESIS  ||   [[svenska]], [[finska]], [[isländska]], [[tyska]], [[ungerska]], [[turkiska]], [[azeriska]], [[estniska]], [[gagauziska]], [[isländska]], [[luxemburgiska]], [[rätromanska]], [[samiska]]
|-
|  U+022B  ||style=" font-size: 140%; line-height: 180%;" |   ȫ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH DIAERESIS AND MACRON  ||  U+022A  ||style=" font-size: 140%; line-height: 180%;" |   Ȫ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH DIAERESIS AND MACRON ||
|-
|  U+0151  ||style=" font-size: 140%; line-height: 180%;" |   [[ő]]  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH DOUBLE ACUTE  ||  U+0150  ||style=" font-size: 140%; line-height: 180%;" |   Ő  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH DOUBLE ACUTE  ||   [[ungerska]]
|-
|  U+00F5  ||style=" font-size: 140%; line-height: 180%;" |   [[õ]]  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH TILDE  ||  U+00D5  ||style=" font-size: 140%; line-height: 180%;" |   Õ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH TILDE  ||   [[portugisiska]], [[estniska]], [[liviska]]
|-
|  U+1E4D  ||style=" font-size: 140%; line-height: 180%;" |   ṍ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH TILDE AND ACUTE
|  U+1E4C  ||style=" font-size: 140%; line-height: 180%;" |   Ṍ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH TILDE AND ACUTE ||
|-
|  U+1E4F  ||style=" font-size: 140%; line-height: 180%;" |   ṏ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH TILDE AND DIAERESIS
|  U+1E4E  ||style=" font-size: 140%; line-height: 180%;" |   Ṏ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH TILDE AND DIAERESIS ||
|-
|  U+022D  ||style=" font-size: 140%; line-height: 180%;" |   ȭ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH TILDE AND MACRON
|  U+022C  ||style=" font-size: 140%; line-height: 180%;" |   Ȭ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH TILDE AND MACRON ||  [[liviska]]
|-
|  U+022F  ||style=" font-size: 140%; line-height: 180%;" |   ȯ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH DOT ABOVE  ||  U+022E  ||style=" font-size: 140%; line-height: 180%;" |   Ȯ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH DOT ABOVE  ||   [[liviska]]
|-
|  U+0230  ||style=" font-size: 140%; line-height: 180%;" |   Ȱ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH DOT ABOVE AND MACRON
|  U+0231  ||style=" font-size: 140%; line-height: 180%;" |   ȱ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH DOT ABOVE AND MACRON || [[liviska]]
|-
|  U+00F8  ||style=" font-size: 140%; line-height: 180%;" |   [[ø]]  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH STROKE
|  U+00D8  ||style=" font-size: 140%; line-height: 180%;" |   Ø  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH STROKE  ||   [[danska]], [[norska]], [[färöiska]], [[samiska]]
|-
|  U+01FF  ||style=" font-size: 140%; line-height: 180%;" |   ǿ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH STROKE AND ACUTE
|  U+01FE  ||style=" font-size: 140%; line-height: 180%;" |   Ǿ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH STROKE AND ACUTE || [[danska]] (sällsynt, finns i till exempel ordet gǿr)
|-
|  U+01EB  ||style=" font-size: 140%; line-height: 180%;" |   [[ǫ]]  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH OGONEK
|  U+01EA  ||style=" font-size: 140%; line-height: 180%;" |   Ǫ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH OGONEK  ||   [[samiska]], [[isländska]] (äldre [[ortografi]]), [[dogrib]]
|-
|  U+01ED  ||style=" font-size: 140%; line-height: 180%;" |   ǭ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH OGONEK AND MACRON
|  U+01EC  ||style=" font-size: 140%; line-height: 180%;" |   Ǭ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH OGONEK AND MACRON ||
|-
|  U+014D  ||style=" font-size: 140%; line-height: 180%;" |   ō  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH MACRON
|  U+014C  ||style=" font-size: 140%; line-height: 180%;" |   Ō  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH MACRON  ||   [[lettiska]], [[liviska]], [[pinyin]]
|-
|  U+1E53  ||style=" font-size: 140%; line-height: 180%;" |   ṓ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH MACRON AND ACUTE  ||  U+1E52  ||style=" font-size: 140%; line-height: 180%;" |   Ṓ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH MACRON AND ACUTE ||
|-
|  U+1E51  ||style=" font-size: 140%; line-height: 180%;" |   ṑ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH MACRON AND GRAVE  ||  U+1E50  ||style=" font-size: 140%; line-height: 180%;" |   Ṑ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH MACRON AND GRAVE ||
|-
|  U+1ECF  ||style=" font-size: 140%; line-height: 180%;" |   ỏ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH HOOK ABOVE  ||  U+1ECE  ||style=" font-size: 140%; line-height: 180%;" |   Ỏ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH HOOK ABOVE  ||   [[vietnamesiska]]
|-
|  U+020D  ||style=" font-size: 140%; line-height: 180%;" |   ȍ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH DOUBLE GRAVE  ||  U+020C  ||style=" font-size: 140%; line-height: 180%;" |   Ȍ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH DOUBLE GRAVE  ||   [[slovenska]], [[kroatiska]]
|-
|  U+020F  ||style=" font-size: 140%; line-height: 180%;" |   ȏ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH INVERTED BREVE  ||  U+020E  ||style=" font-size: 140%; line-height: 180%;" |   Ȏ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH INVERTED BREVE  ||   [[slovenska]], [[kroatiska]]
|-
|  U+01A1  ||style=" font-size: 140%; line-height: 180%;" |   ơ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH HORN  ||  U+01A0  ||style=" font-size: 140%; line-height: 180%;" |   Ơ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH HORN  ||   [[vietnamesiska]]
|-
|  U+1EDB  ||style=" font-size: 140%; line-height: 180%;" |   ớ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH HORN AND ACUTE  ||  U+1EDA  ||style=" font-size: 140%; line-height: 180%;" |   Ớ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH HORN AND ACUTE  ||   [[vietnamesiska]]
|-
|  U+1EDD  ||style=" font-size: 140%; line-height: 180%;" |   ờ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH HORN AND GRAVE  ||  U+1EDC  ||style=" font-size: 140%; line-height: 180%;" |   Ờ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH HORN AND GRAVE  ||   [[vietnamesiska]]
|-
|  U+1EE1  ||style=" font-size: 140%; line-height: 180%;" |   ỡ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH HORN AND TILDE  ||  U+1EE0  ||style=" font-size: 140%; line-height: 180%;" |   Ỡ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH HORN AND TILDE  ||   [[vietnamesiska]]
|-
|  U+1EDF  ||style=" font-size: 140%; line-height: 180%;" |   ở  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH HORN AND HOOK ABOVE  ||  U+1EDE  ||style=" font-size: 140%; line-height: 180%;" |   Ở  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH HORN AND HOOK ABOVE  ||   [[vietnamesiska]]
|-
|  U+1EE3  ||style=" font-size: 140%; line-height: 180%;" |   ợ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH HORN AND DOT BELOW  ||  U+1EE2  ||style=" font-size: 140%; line-height: 180%;" |   Ợ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH HORN AND DOT BELOW  ||   [[vietnamesiska]]
|-
|  U+1ECD  ||style=" font-size: 140%; line-height: 180%;" |   ọ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH DOT BELOW  ||  U+1ECC  ||style=" font-size: 140%; line-height: 180%;" |   Ọ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH DOT BELOW  ||   [[vietnamesiska]]
|-
|  U+1ED9  ||style=" font-size: 140%; line-height: 180%;" |   ộ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER O WITH CIRCUMFLEX AND DOT BELOW  ||  U+1ED8  ||style=" font-size: 140%; line-height: 180%;" |   Ộ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER O WITH CIRCUMFLEX AND DOT BELOW  ||   [[vietnamesiska]]
|-
|  U+0153  ||style=" font-size: 140%; line-height: 180%;" |   [[œ]]  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LIGATURE OE  ||  U+0152  ||style=" font-size: 140%; line-height: 180%;" |   Œ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LIGATURE OE  ||   [[franska]], [[engelska]]
|-
|  U+0223  ||style=" font-size: 140%; line-height: 180%;" |   ȣ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER OU  ||  U+0222  ||style=" font-size: 140%; line-height: 180%;" |   Ȣ  ||style="font-size: 60%; line-height: 170%;" |   LATIN CAPITAL LETTER OU  ||   [[algonkinska]], [[huron]]
|-
|  U+0275  ||style=" font-size: 140%; line-height: 180%;" |   ɵ  ||style="font-size: 60%; line-height: 170%;" |   LATIN SMALL LETTER BARRED O || || || ||   [[Internationella fonetiska alfabetet|IPA]]
|-
|   U+0276  ||style=" font-size: 140%; line-height: 180%;" |   ɶ  ||style="font-size: 60%; line-height: 170%;" |   LATIN LETTER SMALL CAPITAL OE || || || ||   [[Internationella fonetiska alfabetet|IPA]]
|-
|  U+00A4  ||style=" font-size: 140%; line-height: 180%;" |   [[¤]]  ||style="font-size: 60%; line-height: 170%;" |   CURRENCY SIGN  ||    ||     ||  ||     ”generisk” valutasymbol, uppfanns som ”ersättning” för $-tecknet i ASCII för [[ISO/IEC 646]]
|}
I ASCII-baserade kodningar lagras O med värdet 0x4F (hexadecimalt) och o med värdet 0x6F (hexadecimalt).
I EBCDIC-baserade kodningar lagras O med värdet 0xD6 (hexadecimalt) och o med värdet 0x96 (hexadecimalt).
Övriga varianter av O lagras med olika värden beroende på vilken kodning som används, om de alls kan representeras.

== Referenser ==
<references/>

== Externa länkar ==
* {{commons}}

{{alfabetet}}

[[Kategori:Latinska alfabetet]]