The usage of this Phoenician letter for just a vowel audio is because of the early Greek alphabets, which adopted the letter "omicron" to depict the vowel /o/. The letter was adopted with the value while in the Outdated Italic alphabets, such as the early Latin alphabet. Clever Vocabulary: https://musica-infantil88875.onzeblog.com/37185138/the-basic-principles-of-canal-infantil