The system of classifying and naming organisms that is still in use today is Linnaeus's system, developed by Carl Linnaeus in the 18th century.

This system is called binomial nomenclature, which means that each species is given a two-part name:

* Genus: The first part of the name, which groups similar species together.

* Species: The second part of the name, which distinguishes the specific species within the genus.

For example, the scientific name for humans is *Homo sapiens*. *Homo* is the genus, and *sapiens* is the species.

While Linnaeus's system has been modified and expanded over time, the fundamental principles of binomial nomenclature and his hierarchical classification system (Kingdom, Phylum, Class, Order, Family, Genus, Species) are still used today by scientists worldwide.