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Classification has multiple meanings within Wikipedia:
  1. In biology and ontology, classification is the act of a human placing an object or concept into a taxonomy. For biologists, species are specifically placed into a biological taxonomy.
  2. In statistics and machine learning, classification is a type of statistical algorithm, which takes a feature representation of an object or concept and maps it to a classification label. Typically, a classification algorithm computes a posterior probability: the probability of a class label, given that the feature input was observed. (See supervised learning).