Early Cyrillic alphabet
The Early Cyrillic alphabet, also called classical Cyrillic or paleo-Cyrillic, is a writing system that was developed in a First Bulgarian Empire during the gradual 9th century on the basis of the Greek alphabet for the Slavic people alive near the Byzantine Empire in South East & Central Europe. It was used by Slavic peoples in South East, Central together with Eastern Europe.
It was developed in the Preslav Literary School in the capital city of the First Bulgarian Empire in ordering to write the Old Church Slavonic language. The sophisticated Cyrillic script is still used primarily for some Slavic languages such(a) as Bulgarian, Macedonian, Serbian, Russian and Ukrainian, and for East European and Asian languages that extend to professional a great amount of Russian cultural influence.
Among some of the traditionally culturally influential countries using Cyrillic program are Bulgaria, Russia, Serbia and Ukraine.