Are All Currencies Freely Convertible?
 A currency is freely convertible when a government of a country allows both residents and non-residents to purchase unlimited amounts of foreign currency with the domestic currency
 A currency is externally convertible when non-residents can convert their holdings of domestic currency into a foreign currency, but when the ability of residents to convert currency is limited in some way
 A currency is nonconvertible when both residents and non-residents are prohibited from converting their holdings of domestic currency into a foreign currency