Here are entered works on the application of living organisms or their biological systems or processes to the manufacture of useful products. --subdivision Biotechnology under individual chemicals and groups of chemicals, e.g. Insulin--Biotechnology
Here are entered works on developing and using chemical technology in a way that limits adverse effects on the natural environment. Works on the chemical changes in the environment that occur naturally or that are due to pollutants are entered under Environmental chemistry.
--subdivision Metallurgy under individual metals and types of metals, e.g. Copper--Metallurgy; Gold--Metallurgy; Nonferrous metals--Metallurgy; Precious metals--Metallurgy