1, $ is the abbreviation of USD (commonly known as USD), which is the currency of the United States. The currency symbol is USD, and the currency notes in circulation are all versions of banknotes issued since 1929.

2、"?" It is not only the writing symbol of RMB, but also represents the monetary system of RMB and the unit "yuan" of RMB. It is also a symbol of Japanese currency. The appearance of symbols dates back to the Republic of China.

3、? , euro symbol? It is composed of the third letter C in English (also the fifth letter in Greek) and two horizontal lines in the middle. The prototype of this symbol comes from well-known letters, so it is easy to identify. The two horizontal lines in the middle can be reminiscent of two lines on currency symbols such as the US dollar and the Japanese yen.

4. It is the currency symbol of the pound, representing the same name currencies of Britain and some other countries. Sterling is mainly issued by the Bank of England, but there are also other issuers. The pound was once the most widely used currency in international settlement business.

5. Australian Dollar (Australian dollar, abbreviated as A$ or AUD) is the monetary unit of Australia. In the foreign exchange market, the Australian dollar is currently the fifth largest currency in the world, accounting for 6% of the total trading volume, second only to the US dollar, the euro, the Japanese yen and the British pound. In 20 10, the Australian dollar officially replaced the Swiss franc as the fifth largest currency in the world.