Around the 5th century, Indian clerks were already finding new ways of recording the contents of the abacus.
ɚɹˈaʊnd ðə fˈɪfθ sˈɛntʃɚɹi, ˈɪndiən klˈɜːks wɜːɹ ɔːlɹˌɛdi fˈaɪndɪŋ nˈuː wˈeɪz ʌv ɹᵻkˈoːɹdɪŋ ðə kˈɑːntɛnts ʌvðɪ ˈæbækəs.