The use of this Phoenician letter for any vowel audio is a result of the early Greek alphabets, which adopted the letter "omicron" to stand for the vowel /o/. The letter was adopted with the worth during the Aged Italic alphabets, such as the early Latin alphabet. Good Vocabulary: https://louisxczma.blog2freedom.com/37159204/musica-infantil-can-be-fun-for-anyone