History of the alphabet many letters the Proto-Sinaitic alphabet had nor what their alphabetic order was. Among its descendants, the Ugaritic alphabet had 27 consonants, the South Arabian alphabets had 29, and the Phoenician alphabet 22. These scripts were arranged in two orders, an "ABGDE" order in Phoenician and an "HMĦLQ" order in the south; Ugaritic preserved both orders. Both sequences proved remarkably stable among the descendants of these scripts. The letter names proved stable among the many descendants of Phoenician, including Samaritan, Aramaic, Syriac, Arabic, Hebrew, and Greek alphabet. However, they were largely abandoned in Tifinagh, Latin and Cyrillic. The letter sequence continued
Biblical Hebrew source for the modern Hebrew alphabet. All of these scripts were lacking letters to represent all of the sounds of Biblical Hebrew, though these sounds are reflected in Greek and Latin transcriptions/translations of the time. These scripts originally only indicated consonants, but certain letters, known by the Latin term "matres lectionis", became increasingly used to mark vowels. In the Middle Ages, various systems of diacritics were developed to mark the vowels in Hebrew manuscripts; of these, only the Tiberian vocalization is still in wide use. Biblical Hebrew possessed a series of "emphatic" consonants whose precise articulation is disputed, likely ejective