Double O is a letter of the

Cyrillic script The Cyrillic script ( ), Slavonic script or the Slavic script, is a writing system used for various languages across Eurasia. It is the designated national script in various Slavic languages, Slavic, Turkic languages, Turkic, Mongolic languages, ...

. It is found in some early

Old Church Slavonic Old Church Slavonic or Old Slavonic () was the first Slavic languages, Slavic literary language. Historians credit the 9th-century Byzantine Empire, Byzantine missionaries Saints Cyril and Methodius with Standard language, standardizing the lan ...

manuscripts, where it is used in place of in: "two"' "both"' "twelve"' and "twelve". The Cyrillic "double O" looks similar to the Latin-script double-''o'' ligature: .

Computing encodings

References

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