Taxonomy, or taxonomy, is originally derived from the need for scientific classification of species. It now extends to other sciences, including human sciences, information sciences and computer science. Sometimes we call it "taxonomy" to describe the result of a taxonomic activity, that is to say a classification.
The traditional classification is based on a fixed hierarchy of categories (taxon ranks), defined as follows:
Reign (or Kingdom) (there are currently six) → Division (or phylum) → class → order → family → gender → species.