Cyrillic Extended-B is a Unicode block containing Cyrillic characters for writing Old Cyrillic and Old Abkhazian, and combining numeric signs for Cyrillic numerals used in early Slavic or Church Slavonic texts.
Block
History The following Unicode-related documents record the purpose and process of defining specific characters in the Cyrillic Extended-B block:
Version Count L2 ID WG2 ID Document 5.1 U+A640..A65F, A662..A673, A67C..A697 78 N3194 doc) N5170 6.0 U+A660..A661 2 N3563R doc) 6.1 U+A674..A67B, A69F 9 N3748 doc) 7.0 U+A698..A69B 4 N3772 N3974 N4103 U+A69C..A69D 2 N3914 N4062 N4070 N4116 N4103 8.0 U+A69E 1 N4390 doc)
References