ɐ sˈɪɹiəl ˈɪntɚfˌeɪs bˈoːɹd dɪzˈaɪnd baɪ ɹˈɑːdʒɚ smˈɪθ wʌz pˈʌblɪʃt ɪnðə fˈɛbɹuːˌɛɹi nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈaɪv ˈɪʃuː ʌv ɹˈeɪdɪˌoʊ ᵻlɛktɹˈɑːnɪks.
A serial interface board designed by Roger Smith was published in the February 1975 issue of Radio Electronics.