Other key sectors are manufacturing and construction. This again depends on positive economic growth in the US, Europe and Japan. One dollar is divided into 100 cents. The Singapore dollar and the Brunei dollar are accepted at par in each country under an Interchangeability Agreement, so don't be surprised if you do get a note with a picture of the Sultan of Brunei. Legal tender Notes are legal tender up to their face value for paying any amount.
Coins are messier.
You can rid yourself of those coins at charity boxes found at most Cold Storage supermarket checkout counters, or around shopping centres.