Under the Parthian, Sassanian, and Iranian empires, scholars concentrated on exchanging knowledge and inventions with the countries around them – India, China, and the Roman Empire- which is how the abacus may have been exported to other countries.
ˌʌndɚ ðə pˈɑːɹθiən, sæsˈeɪniən, ænd ɪɹˈeɪniən ˈɛmpaɪɚz, skˈɑːlɚz kˈɑːnsəntɹˌeɪɾᵻd ˌɔn ɛkstʃˈeɪndʒɪŋ nˈɑːlɪdʒ ænd ɪnvˈɛnʃənz wɪððə kˈʌntɹiz ɚɹˈaʊnd ðˌɛm ˈɪndiə, tʃˈaɪnə, ænd ðə ɹˈoʊmən ˈɛmpaɪɚ wˌɪtʃ ɪz hˌaʊ ðɪ ˈæbækəs mˌeɪhɐv bˌɪn ɛkspˈoːɹɾᵻd tʊ ˈʌðɚ kˈʌntɹiz.