cyr

Cyr is a short form occasionally used in linguistic, typographic, and bibliographic contexts to refer to the Cyrillic script. It is not a formal standard name for the script itself; the most common official designation in international standards is the four-letter code Cyrl for Cyrillic script (ISO 15924). In some databases and software, "Cyr" may appear as an abbreviation for Cyrillic or for field labels indicating Cyrillic text.

Cyrillic originated in the First Bulgarian Empire during the 9th century, credited to the work of Saints Cyril and Methodius and their students. It was developed to transcribe Old Church Slavonic and has since adapted to many languages across Eastern Europe and Central Asia, including Russian, Ukrainian, Bulgarian, Serbian, Kazakh, and others. Variants and digraphs have been created to accommodate distinct phonologies.

Modern use is governed by standards and encoding: ISO 15924 assigns Cyrl to Cyrillic; Unicode encodes Cyrillic letters across multiple blocks (Cyrillic, Cyrillic Extended, etc.). Fonts and typesetting rely on these encodings to render Cyrillic text.

Today Cyrillic is one of the most widely used writing systems in the world, with extensive digital support and national standards. It coexists with Latin, the other major writing system in international communication, and with historical scripts like Glagolitic.