ɪt wʌz ɹᵻplˈeɪst ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɛvən baɪ ðɪ ɪmpɹˈuːvd sˌiːtˈiː sˈɪksti fˈoːɹ ðæt ˈɔfɚd skɹˈoʊlɪŋ ænd sˈɪksti fˈoːɹ kˈæɹɪktɚz pɜː lˈaɪn ʌv ˌʌpɚ ænd lˈoʊɚ kˈeɪs.
It was replaced in 1977 by the improved CT-64 that offered scrolling and 64 characters per line of upper and lower case.