Earlier versions of ASCII used the up arrow instead of the caret (5Ehex) and the left arrow instead of the underscore (5Fhex).
ˈɜːlɪɚ vˈɜːʒənz ʌv ˈæski jˈuːzd ðɪ ˌʌp ˈæɹoʊ ɪnstˈɛd ʌvðə kˈæɹət fˈaɪv ˈɛhɛks ænd ðə lˈɛft ˈæɹoʊ ɪnstˈɛd ʌvðɪ ˌʌndɚskˈoːɹ fˈaɪv ˈɛfhˈɛks.