1. The riyal has been fixed against the US dollar at about 3.64 to 1 since 1980.

2. The Qatari riyal (currency code QAR) is the official currency of Qatar.

3. Boosting the value of the riyal or dirham wouldn't alter the world price of oil or the amount the Gulf countries export.

4. The Yemeni rial or Yemeni riyal is the currency of Yemen.

5. The reissue of an exit visa took two hours and a thousand riyals.

6. The Gulf's oil exporters, for instance, tie their currencies to the dollar: the Saudi riyal is fixed firmly at 3.75 to the greenback.

7. Runaway non-rent inflation earlier this year led the Qatari government to peg the riyal to the dollar.