History of the Greek alphabet
![Black figure vessel with double alphabet inscription, showing new letters ΥΧ[Φ]Ψ, and ΥΧΦΨΩ.](/Images/godic/202501/12/NAMA_Alphabet_grec3929.jpg")



The history of the Greek alphabet starts with the adoption of Phoenician letter forms and continues to the present day. This article concentrates on the early period, before the codification of the now-standard Greek alphabet.
The Phoenician alphabet was strictly speaking an abjad that was consistently explicit only about consonants, though even by the 9th century BC it had developed matres lectionis to indicate some, mostly final, vowels. This arrangement is much less suitable for Greek than for Semitic languages, and these matres lectionis, as well as several Phoenician letters which represented consonants not present in Greek, were adapted according to the acrophonic principle to represent Greek vowels consistently, if not unambiguously.