ASCII was first used commercially during 1963 as a seven-bit teleprinter code for American Telephone & Telegraph's TWX (TeletypeWriter eXchange) network.
ˈæski wʌz fˈɜːst jˈuːzd kəmˈɜːʃəli dˈʊɹɹɪŋ nˈaɪntiːnhˈʌndɹɪd sˈɪksti θɹˈiː æz ɐ sˈɛvənbˈɪt tˈɛlᵻpɹˌɪntɚ kˈoʊd fɔːɹ ɐmˈɛɹɪkən tˈɛlᵻfˌoʊn ænd tˈɛlᵻɡɹˌæfz tˌiːdˌʌbəljˌuːˈɛks tˈɛlᵻtˌaɪp ɹˈaɪɾɚɹ ˈiː ˈɛkstʃˈeɪndʒ nˈɛtwɜːk.