*Some of this arcticle was taken from Wikipedia.*
Taxonomy is the classification of nature scientifically. The main taxonomic ranks are: Kingdom, Phylum, Class, Order, Family, Genus and Species, the other ranks that may be placed inbetween are the lesser ranks such as Subclass, Subfamily and Subspecies. Taxonomy can be used and can apply to non-living objects and man-made structures as well. Taxonomic classification was used to keep track of species and "order them" neatly.
Taxanomic rank examples:
Kingdom (Animalia)----Phylum (Arthropoda)----Class (Insecta)---Order (Coleoptera)---Family (Elateridae)----Genus (Ampedus)----Species (A. apicatus)-----Subspecies (A. apicatus apicatus)
A newly thought version of the Taxanomic ranks is like this:
Life, Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
A picture of this newly thought version here: Wikipedia