LittleYus and Big Yus, or Jus, are the letters representing two Common Slavonic nasal vowels, in the early Cyrillic and Glagolitic alphabets.
Phonetically, LittleYus represents a nasalized front vowel, possibly IPA, while Big Yus represents a nasalized back vowel, such as IPA.
In Russia, LittleYus was adapted to represent the iotated /ja/ я in the middle or end of a word; the modern letter Ya я is an adaptation of its cursive form of the seventeenth century, enshrined by the typographical reform of 1708.
LittleYus (Ѧ, ѧ) and Big Yus (Ѫ, ѫ), or Jus, are the letters representing two Common Slavonic nasal vowels, in the early Cyrillic and Glagolitic alphabets.
Big Yus was a part of the Bulgarian alphabet until 1945.
In Russia, LittleYus was adapted to represent the iotated /ja/ я in the middle or end of a word; the modern letter Ya я is an adaptation of its cursive form of the seventeenth century, enshrined by the typographical reform of 1708.