He was now only 18 seconds down on the general classification.

For more information, see our guide on classification of goods.

A debate still continues on the classification of the cells.

They have had a deep impact on the classification of finite simple groups.

He had a big influence on the scientific classification of birds.

This result is based on classification of finite simple groups.

He was a major influence on the classification of finite simple groups.

Some foundational results on classification were known in the 1950s.

The book became 'Europe's principal text on the classification and treatment of disease'.

Even more strangely, there was near total agreement on the 'right' classification.