The som (Kyrgyz: сом, sometimes transliterated as "sum" or "soum") is the currency of the Kyrgyz Republic in Central Asia. The ISO 4217 currency code is KGS. The som is sub-divided into 100 tyiyn (Kyrgyz: тыйын). The som was introduced on May 10, 1993, replacing the Soviet ruble at a rate of 1 som = 200 rubles.