An information processor or information processing system, as its name suggests, is a system (be it electrical, mechanical or biological) which takes information (a sequence of enumerated symbols or states) in one form and processes (transforms) it into another form, e.g. to statistics, by an algorithmic process. An information processing system is made up of four basic parts, or sub-systems: * input * processor * storage * output In this example, both the rock and the earth are information processing systems, because both objects change the properties of the other over time.