Industrial Photography Around The World

Quaternary - This group is involved in the research of science and technology. They include scientists.
As a country develops people move away from the primary sector to secondary and then to tertiary.
There are many other different kinds of industries, and often organized into different classes or sectors by a variety of industrial classifications.
Industry classification systems used by the government commonly divide industry into three sectors: agriculture, manufacturing, and services. The primary sector of industry is agriculture, mining and raw material extraction. The secondary sector of industry is manufacturing. The tertiary sector of industry is service production. Sometimes, one talks about a quaternary sector of industry, consisting of intellectual services such as research and development (R&D).