International Telegraph Alphabet No. 2 (ITA2) standard of 1924, FIELDATA (1956), and early EBCDIC (1963), more than 64 codes were required for ASCII.
ˌɪntɚnˈæʃənəl tˈɛlᵻɡɹˌæf ˈælfəbˌɛt nˈoʊ. tˈuː ˌaɪtˌiːˈeɪ tˈuː stˈændɚd ʌv nˈaɪntiːnhˈʌndɹɪd twˈɛnti fˈoːɹ, fˈiːldeɪɾə nˈaɪntiːnhˈʌndɹɪd fˈɪfti sˈɪks, ænd ˈɜːli ˈɛbkdɪk nˈaɪntiːnhˈʌndɹɪd sˈɪksti θɹˈiː, mˈoːɹ ðɐn sˈɪksti fˈoːɹ kˈoʊdz wɜː ɹᵻkwˈaɪɚd fɔːɹ ˈæski.