Uzbekistani sum. The sum (Uzbek: so??m, ?????? [som]; ISO code: UZS) is the official currency of Uzbekistan. Uzbekistan replaced the ruble with the sum at par in on 16 July 1994. No subdivisions of this sum were initially issued and only banknotes were produced, in denominations of 1, 3, 5, 10, 25, 50, 100, 200, 500, 1,000, 5,000, and 10,000 sum. Further series, however, have introduced coins and a subunit, the tiyin. Because it was meant to be a transitional currency, the design was rather simplistic. Etymology The official name of the Soviet currency in Kazakh, Kyrgyz, Tajik, and Uzbek was som, and this name appeared written on the back of banknotes, among the texts for the value of the note in all 15 official languages of the USSR. The word sum (alternatively transliterated "som" or "soum") means "pure" in Kazakh, Kyrgyz...