Originally based on the (modern) English alphabet, ASCII encodes 128 specified characters into seven-bit integers as shown by the ASCII chart in this article.
ɚɹˈɪdʒɪnəli bˈeɪst ɔnðə mˈɑːdɚn ˈɪŋɡlɪʃ ˈælfəbˌɛt, ˈæski ɛŋkˈoʊdz wˈʌnhˈʌndɹɪd twˈɛnti ˈeɪt spˈɛsᵻfˌaɪd kˈæɹɪktɚz ˌɪntʊ sˈɛvənbˈɪt ˈɪntɪdʒɚz æz ʃˈoʊn baɪ ðɪ ˈæski tʃˈɑːɹt ɪn ðɪs ˈɑːɹɾɪkəl.