The ruble or rouble (Russian: рубль rublʹ, plural рубли́ rubli; see note on English spelling an Russian plurals with numbers) is the currency of the Russian Federation and the two self-proclaimed republics of Abkhazia and South Ossetia. Formerly, the ruble was also the currency of the Soviet Union and the Russian Empire prior to their breakups. The ruble is subdivided into 100 kopecks (sometimes transliterated kopeks, or copecks, Russian: копе́йка, plural: копе́йки or копеек). The ISO 4217 code is RUB; the former code, RUR, refers to the Russian ruble prior to the 1998 denomination (1 RUB = 1000 RUR).