This document discusses different types of occupations: - Primary occupations involve extracting raw materials from the environment like farming, fishing, and mining. They are more common in developing countries and have a low economic value. - Secondary occupations process primary goods into more useful products through industries like manufacturing, which is more prominent in developed countries. - Tertiary occupations provide services rather than goods, such as healthcare, education, and retail. They make up the largest and highest paying sector today. - Quaternary occupations focus on information services, consulting, and research and development (R&D) in fields like computing and science to support further business expansion.