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The first two in the sequence are by far the most common; 'tertiary' appears occasionally, and higher numbers are rare except in specialized contexts ('quaternary period'). The Greek series proto- , deutero- , trito- , ... is only found in prefixes, generally scholarly and technical coinages, e.g. protagonist, deuteragonist, tritagonist ...
Educational stages are subdivisions of formal learning, typically covering early childhood education, primary education, secondary education and tertiary education.The United Nations Educational, Scientific and Cultural Organization recognizes nine levels of education in its International Standard Classification of Education (ISCED) system (from Level 0 (pre-primary education) through Level 8 ...
Primary, secondary and tertiary sources are broadly defined here as follows: Primary sources are sources very close to the origin of a particular topic or event. An eyewitness account of a traffic accident is an example of a primary source.
Primary gain and secondary gain, ... Tertiary gain, a less well-studied process, is the benefit that a third-party receives from the patient's symptoms. [3]
Primary: involves the retrieval and production of raw-material commodities, such as corn, coal, wood or iron. Miners, farmers and fishermen are all workers in the primary sector. Secondary: involves the transformation of raw or intermediate materials into goods, as in steel into cars, or textiles into clothing. Builders and dressmakers work in ...
Primary sector: 40%; Secondary sector: 40%; Tertiary sector: 20%; More machinery is deployed in the primary sector, which reduces the number of workers needed to produce a given output of food and raw materials. Since the food requirements of a given population do not change much, employment in agriculture declines as a proportion of the ...
Post-secondary non-tertiary education: Programmes providing learning experiences that build on secondary education and prepare for labour market entry or tertiary education. The content is broader than secondary but not as complex as tertiary education. 5 : Short-cycle tertiary education
A primary source can have all of these qualities, and a secondary source may have none of them. Deciding whether primary, secondary or tertiary sources are appropriate on any given occasion is a matter of good editorial judgment and common sense, not merely mindless, knee-jerk reactions to classification of a source as "primary" or "secondary".