classification: the action or process of classifying something according to shared qualities or characteristics.
taxonomy: the branch of science concerned with classification, especially of organisms; systematics.
Binomial Nomenclature is a system for naming plants and animals with two Latin names. One is for the Genus. The other for the species and where it belongs. Example: Panthera leo or the lion. http://www.dictionary.com/browse/binomial-nomenclature