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  2. Classified information - Wikipedia

    en.wikipedia.org/wiki/Classified_information

    The original overall classification of the page, "top secret", and the Special Intelligence code word "umbra", are shown at top and bottom. The classification of individual paragraphs and reference titles is shown in parentheses—there are six different levels on this page alone.

  3. Classification - Wikipedia

    en.wikipedia.org/wiki/Classification

    The meaning of the word 'classification' (and its synonyms) may take on one of several related meanings. It may encompass both classification and the creation of classes, as for example in 'the task of categorizing pages in Wikipedia'; this overall activity is listed under taxonomy. It may refer exclusively to the underlying scheme of classes ...

  4. Classified information in the United States - Wikipedia

    en.wikipedia.org/wiki/Classified_information_in...

    Step 3 in the classification process is to assign a reason for the classification. Classification categories are marked by the number "1.4" followed by one or more letters (a) to (h): [50] [52] 1.4(a) military plans, weapons systems, or operations; 1.4(b) foreign government information; 1.4(c) intelligence activities, sources, or methods, or ...

  5. Essay - Wikipedia

    en.wikipedia.org/wiki/Essay

    It is difficult to define the genre into which essays fall. Aldous Huxley, a leading essayist, gives guidance on the subject. [4] He notes that "the essay is a literary device for saying almost everything about almost anything", and adds that "by tradition, almost by definition, the essay is a short piece".

  6. Document classification - Wikipedia

    en.wikipedia.org/wiki/Document_classification

    Content-based classification is classification in which the weight given to particular subjects in a document determines the class to which the document is assigned. It is, for example, a common rule for classification in libraries, that at least 20% of the content of a book should be about the class to which the book is assigned. [1]

  7. Cognitive categorization - Wikipedia

    en.wikipedia.org/wiki/Cognitive_categorization

    Categorization is a type of cognition involving conceptual differentiation between characteristics of conscious experience, such as objects, events, or ideas.It involves the abstraction and differentiation of aspects of experience by sorting and distinguishing between groupings, through classification or typification [1] [2] on the basis of traits, features, similarities or other criteria that ...

  8. Library classification - Wikipedia

    en.wikipedia.org/wiki/Library_classification

    Library classification is an important and crucial aspect in library and information science.It is distinct from scientific classification in that it has as its goal to provide a useful ordering of documents rather than a theoretical organization of knowledge. [2]

  9. Taxonomy (biology) - Wikipedia

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

    A whole set of terms including taxonomy, systematic biology, systematics, scientific classification, biological classification, and phylogenetics have at times had overlapping meanings – sometimes the same, sometimes slightly different, but always related and intersecting. [1] [11] The broadest meaning