The United States Dollar (USD) is the official currency of the United States, first issued in 1792. It is identified by the ISO 4217 code USD and is commonly represented by the symbol $. The authority for issuing US dollars lies with the United States Department of the Treasury. Currently, circulating US dollar banknotes include denominations of 1, 2, 5, 10, 20, 50, and 100 dollars, along with coins in denominations of 1, 5, 10, 25, 50 cents, and 1 dollar. The U.S. Dollar ranks first globally in terms of trading volume, comprising 88.3% of the total global foreign exchange transactions. Local money changers in Hong Kong all offer the buying and selling of U.S. Dollars.

The Omani Rial (OMR) is the official currency of Oman, first introduced in 1973. It is identified by the ISO 4217 code OMR and is commonly represented by the symbol ﷼ or RO. The issuance and management of the Omani Rial are overseen by the Central Bank of Oman. Currently, circulating Omani Rial banknotes include denominations of 100 Baisa, 1, 5, 10, 20, and 50 Rials, with commonly used coin denominations of 5, 10, 25, and 50 Baisa. The Baisa (Baisa) serves as the subunit of the Rial, with 1 Rial equal to 1000 Baisa.