The United States dollar The United States dollar is the official currencyof the USA. The sign for the US dollar is S andthe short form is USD. There are one hundredcents to one dollar. There are coins for cents, andbanknotes, or bills, for dollars.Each dollar banknote has got the portrait ofa famous US president or politician on it. Forexample, George Washington is on the one-dollarbanknote. He was the first president of the USA.US dollar banknotes are made of cotton, notpaper. They are all the same size. In the past, theywere all green. Today you can see different colourson dollar banknotes, such as light purple andyellow. If you look carefully, you can also see awatermark, and tiny red, blue and silver threads.This is to stop people making copies of banknotes.переводите на казакский язык​