http://en.wikipedia.org/wiki/Money http://en.wikipedia.org/wiki/Money "The main functions of money are distinguished as: a medium of exchange; a unit of accoun

http://en.wikipedia.org/wiki/Money http://en.wikipedia.org/wiki/Money "The main functions of money are distinguished as: a medium of exchange; a unit of account; a store of value; and, occasionally, a standard of deferred payment."