Unique Master Citizen Number (Croatian and Bosnian: Jedinstveni matični broj građana, JMBG, Macedonian: Единствен матичен број на граѓанинот, ЕМБГ, Serbian and Montenegrin: Јединствени матични број грађана, ЈМБГ, Jedinstveni matični broj građana, JMBG, Slovene: Enotna matična številka občana, EMŠO) is a unique identification number that was assigned to every citizen of former Yugoslav republics of the SFR Yugoslavia. Today it continues to be used in almost all of the countries that were created after the dissolution of Yugoslavia – Bosnia and Herzegovina, Montenegro, North Macedonia, Serbia and Slovenia use it in its original form, while Croatia has switched to a new identification number called the Personal Identification Number (Croatian: Osobni identifikacijski broj, OIB).