The Cyrillic block includes characters used for writing the Cyrillic script, which is employed in various languages across Eastern Europe and Central Asia, including Russian, Ukrainian, Bulgarian, Serbian, and many others. Developed in the First Bulgarian Empire during the 9th century, the Cyrillic script is named after Saint Cyril, one of the creators of the Glagolitic alphabet. The block contains letters used in modern languages, as well as historical letters that were used in older forms of these languages. The Cyrillic script is also widely used in computing and digital text processing within these regions..