In particular, the Teletype Model 33 machine assignments for codes 17 (control-Q, DC1, also known as XON), 19 (control-S, DC3, also known as XOFF), and 127 (delete) became de facto standards.
ɪn pɚtˈɪkjʊlɚ, ðə tˈɛlᵻtˌaɪp mˈɑːdəl θˈɜːɾi θɹˈiː məʃˈiːn ɐsˈaɪnmənts fɔːɹ kˈoʊdz sˈɛvəntˌiːn kəntɹˈoʊlkjˈuː, dˌiːsˈiː wˈʌn, ˈɔːlsoʊ nˈoʊn æz ˌɛksˌoʊˈɛn, nˈaɪntiːn kəntɹˈoʊlˈɛs, dˌiːsˈiː θɹˈiː, ˈɔːlsoʊ nˈoʊn æz zˈɑːf, ænd wˈʌnhˈʌndɹɪd twˈɛnti sˈɛvən dᵻlˈiːt bɪkˌeɪm də fˈæktoʊ stˈændɚdz.