u vs yus

u

• A thing in the shape of the letter U 

• The name of the Latin-script letter U/u. 

• The twenty-first letter of the English alphabet, called u and written in the Latin script. 

• you (in text messaging and internet conversations) 

yus

• Either of two letters, little yus (Ѧ) and big yus (Ѫ), representing nasal vowel sounds in the Cyrillic alphabet. The only major Slavic language retaining these sounds is Polish, which is written in the Latin alphabet.