What is cyrillic writing?

Cyrillic writing is an alphabetic script used for various Slavic languages, including Russian, Bulgarian, and Serbian, as well as some non-Slavic languages. It was developed in the 9th century and is attributed to the disciples of Saints Cyril and Methodius, who sought to create a written system for the Slavic peoples. The script features a combination of letters derived from Greek and some additional characters to represent specific Slavic sounds. Today, it consists of around 30 letters, with variations existing for different languages.