A disciple of Methodius invented Cyrillic, which was easier than Glagothic script to learn and was more like the Greek alphabet.
Glagothic and Cyrillic script co-existed for several centuries. The Cyrillic alphabet, like its Latin counterpart has Greek roots, being based on the ninth-century uncial script.
Through the ages, it has been modified several times and what is use now in Russian differs from its earlier forms.
The Cyrillic alphabet originally consisted of 43 letters. Various smaller version of this alphabet are currently used in Russia (32 letters), Ukraine (33 letters), Serbia (30 letters) and Bulgarian (30 letters).