The first fully phonemic script, the Proto-Sinaitic script, which developed into the Phoenician alphabet, is considered to be the first alphabet and is the ancestor of most modern alphabets, abjads, and abugidas, including Arabic, Cyrillic, Greek, Hebrew, Latin, and possibly Brahmic.
ðə fˈɜːst fˈʊli fɑːnˈɛmɪk skɹˈɪpt, ðə pɹˈoʊɾoʊsɪnˈeɪɾɪk skɹˈɪpt, wˌɪtʃ dɪvˈɛləpt ˌɪntʊ ðə foʊnˈɪʃən ˈælfəbˌɛt, ɪz kənsˈɪdɚd təbi ðə fˈɜːst ˈælfəbˌɛt ænd ɪz ðɪ ˈænsɛstɚɹ ʌv mˈoʊst mˈɑːdɚn ˈælfəbˌɛts, ɐbdʒˈædz, ænd ɐbjˈuːdʒɪdəz, ɪŋklˈuːdɪŋ ˈæɹɐbˌɪk, sɪɹˈɪlɪk, ɡɹˈiːk, hˈiːbɹuː, lˈætɪn, ænd pˈɑːsᵻbli bɹˈɑːmɪk.