
The rial (ريال, ISO 4217 code OMR) is the currency of Oman. It is divided into 1000 baisa (also written baiza, Arabic: بيسة). ==History== Before 1940, the Indian rupee and the Maria Theresa Thaler (known locally as the rial) were the main currencies circulating in Muscat and Oman, as the state was then known, with rupees circulating on the...
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http://en.wikipedia.org/wiki/Omani_rial
(RO) Monetary unit of Oman, divided into 1,000 baizas. Oman has maintained a fixed exchange rate according to which in 1993 US$1 equaled RO0.3845.
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https://www.photius.com/countries/bahrain/glossary/index.html
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