ABSTRACT
The concept of a system arises from the fact that assemblies of parts organised together in special ways can reveal unique properties which are not possessed by those same parts in isolation. A system possesses some particular property only when it exists as a coherent, organised entity; the property ceases to exist if the system is broken up into its component parts or if these parts are reorganised in a different manner. A system can therefore be understood fully only by studying the whole entity and not merely by analytical study of its constituent parts.
