This document defines the classification terminology used for plants, algae, fungi, and animals. It provides examples of classification terms used to identify different organisms, including the fungus Amanita muscaria, the plant Quercus alba, the whale Balaenoptera musculus, the kelp Macrocystis pyrifera, the poison ivy Toxicodendron radicans, and the bald eagle Haliaeetus leucocephalus.