ABSTRACT
Any classifi cation system involves the grouping of organisms or objects using characteristics common to members within the group. A classifi cation can be as simple as dividing things by colour or size. Fundamental to most systems and making the effort worthwhile is that the classifi cation meets a purpose; has a use. This is generally to make life simpler, such as to fi nd books in a library; they can be classifi ed in different, but helpful ways, e.g. by subject or date of publication, or author or particular use.
