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  2. Three-sector model - Wikipedia

    en.wikipedia.org/wiki/Three-sector_model

    Three sectors according to Fourastié Clark's sector model This figure illustrates the percentages of a country's economy made up by different sector. The figure illustrates that countries with higher levels of socio-economic development tend to have less of their economy made up of primary and secondary sectors and more emphasis in tertiary sectors.

  3. Quinary - Wikipedia

    en.wikipedia.org/wiki/Quinary

    Quinary (base 5 or pental [1] [2] [3]) is a numeral system with five as the base. A possible origination of a quinary system is that there are five digits on either hand . In the quinary place system, five numerals, from 0 to 4 , are used to represent any real number .

  4. Quaternary sector of the economy - Wikipedia

    en.wikipedia.org/wiki/Quaternary_sector_of_the...

    The quaternary sector of the economy is based upon the economic activity that is associated with either the intellectual or knowledge-based economy. [1] This consists of information technology; media; research and development; information-based services such as information-generation and information-sharing; and knowledge-based services such as consultation, entertainment, broadcasting, mass ...

  5. Economic sector - Wikipedia

    en.wikipedia.org/wiki/Economic_sector

    In the 20th century, economists began to suggest that traditional tertiary services could be further distinguished from "quaternary" and quinary service sectors. Economic activity in the hypothetical quaternary sector comprises information- and knowledge-based services, while quinary services include industries related to human services and ...

  6. Industry classification - Wikipedia

    en.wikipedia.org/wiki/Industry_classification

    Economic activities can be classified in a variety of ways. At the top level, they are often classified according to the three-sector theory into sectors: primary (extraction and agriculture), secondary (manufacturing), and tertiary (services). Some authors add quaternary (knowledge) or even quinary (culture and research) sectors. Over time ...

  7. Quinary system - Wikipedia

    en.wikipedia.org/?title=Quinary_system&redirect=no

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  8. Bi-quinary coded decimal - Wikipedia

    en.wikipedia.org/wiki/Bi-quinary_coded_decimal

    Bi-quinary coded decimal is a numeral encoding scheme used in many abacuses and in some early computers, notably the Colossus. [2] The term bi-quinary indicates that the code comprises both a two-state (bi) and a five-state (quinary) component. The encoding resembles that used by many abacuses, with four beads indicating the five values either ...

  9. Systems Approach for Better Education Results - Wikipedia

    en.wikipedia.org/wiki/Systems_Approach_for...

    The strategy “holds that investments in education should achieve Learning for All because growth, development, and poverty reduction depend on the knowledge and skills that people acquire, not the number of years that they sit in a classroom.” [3] SABER underpins Learning for All by focusing on three areas including (a) Public access to ...