Monetary units of the world The free application "Monetary units of the world" is very friendly, it has a beautiful and simple interface. The best choice for a pocket dictionary that is always at hand. From which you can learn a lot of new and interesting things, for example, that: Bit (money) The word bit is a colloquial expression referring to specific coins in various coinages throughout the world. Sicilian piastra The piastra was the distinct currency of the Kingdom of Sicily until 1815.