Ecogeographical classification of arctic vegetation based on shoots density determinations.

These classifications based on a gradient with B1 being the most severe and B3 being the least severe, with B3 skiers having vision around 2/60 to 6/60.

This tariff and statistical classification is based on the international classification known as the Harmonised System (HS) - (depending on the level of breakdown, this could be 1 - 6 digits).

Precise classification of the subspecies of the Eurasian Lynx is still the subject of debate, but based on recent interpretation, the list includes:

Holder takes the position that "classifications based on sexual orientation warrant heightened scrutiny."

Phylogenetic classification of protozoa based on the structure of the linker domain in the bifunctional enzyme, dihydrofolate reductase-thymidylate synthase.

A classification of Danaus butterflies (Lepidoptera: Nymphalidae) based upon data from morphology and DNA.

Urban/rural classification based on 2000 CPH, Report No. 4 Urban Population, National Statistics Office, June 2006.

Wilderness Travel, in Berkeley, Calif., has three classifications - easy, moderate and vigorous - based entirely on elevation.

In 1941, Seddon introduced a classification of nerve injuries based on three main types of nerve fiber injury and whether there is continuity of the nerve.