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  2. Classes of supply - Wikipedia

    en.wikipedia.org/wiki/Classes_of_supply

    Class IX – Repair parts and components to include kits, assemblies, and subassemblies (repairable or non-repairable) required for maintenance support of all equipment. Class X – Material to support nonmilitary programs such as agriculture and economic development (not included in Classes I through IX).

  3. Taxonomic rank - Wikipedia

    en.wikipedia.org/wiki/Taxonomic_rank

    In biology, taxonomic rank (which some authors prefer to call nomenclatural rank [1] because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of organisms (a taxon) in a hierarchy that reflects evolutionary relationships.

  4. List of Latin and Greek words commonly used in systematic ...

    en.wikipedia.org/wiki/List_of_Latin_and_Greek...

    At the time when biologist Carl Linnaeus (1707–1778) published the books that are now accepted as the starting point of binomial nomenclature, Latin was used in Western Europe as the common language of science, and scientific names were in Latin or Greek: Linnaeus continued this practice.

  5. Glossary of economics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_economics

    An economic theory that defines wealth by the amount of precious metals owned. [48] business cycle. Also called the economic cycle or trade cycle. The downward and upward movement of gross domestic product (GDP) around its long-term growth trend. [49] The length of a business cycle is the period of time containing a single boom and contraction ...

  6. Goods - Wikipedia

    en.wikipedia.org/wiki/Goods

    Economics focuses on the study of economic goods, or goods that are scarce; in other words, producing the good requires expending effort or resources. Economic goods contrast with free goods such as air, for which there is an unlimited supply.

  7. Classification - Wikipedia

    en.wikipedia.org/wiki/Classification

    Classification is a part of many different kinds of activities and is studied from many different points of view including medicine, philosophy, law, anthropology, biology, taxonomy, cognition, communications, knowledge organization, psychology, statistics, machine learning, economics and mathematics.

  8. Taxonomy (biology) - Wikipedia

    en.wikipedia.org/wiki/Taxonomy_(biology)

    He not only introduced the standard of class, order, genus, and species, but also made it possible to identify plants and animals from his book, by using the smaller parts of the flower (known as the Linnaean system). [51] Plant and animal taxonomists regard Linnaeus' work as the "starting point" for valid names (at 1753 and 1758 respectively ...

  9. Glossary of scientific naming - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_scientific_naming

    nomen confusum (plural: nomina confusa), (bact.) a name based on a mixed bacterial culture; nomen perplexum (plural: nomina perplexa), a name confusingly similar to another name or names; nomen periculosum (plural: nomina periculosa), an name which can lead to dangerous outcomes, through confusion