ABSTRACT
A system is a set of interdependent parts which together form a unitary whole that performs some function. Essentially, the parts must be interdependent and/or interacting. A heap of components may form a ‘whole’ but not necessarily a system unless arranged, say, to form a machine. Any system can be shown to be a sub-system of some larger system. Thus a carburettor is a sub-system of the car engine and a sub-sub-system of the car itself.
