-- See Also the narrower term Biotechnology 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
--subdivision Metallurgy under names of metals and groups of metals, e.g. Copper--Metallurgy; Gold--Metallurgy; Nonferrous metals--Metallurgy; Precious metals--Metallurgy