A classification system, including a typology, categorization, classification, or short-term classification (although this latter term is also used for classifying activity) is a schedule that allows objects to be classified into one or more attributes or attributes. For objects, the terms classification system, typology and taxonomy can be used almost as synonymous. However, in the psychology, computer science / artificial intelligence, these concepts are sometimes distinguished. The difference is mainly in the way the format is established: empirical (taxonomy) or conceptual (typology).

There are different classification systems. For example, there are classifications that serve to quickly find information: specific classification systems for the Dutch and Flemish language areas the "groups" of search engines on the Internet

In addition, classifications should also be able to analyze complex phenomena in an ordered manner. This arrangement of data makes it easier to communicate. Consider this:

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