Classification is the process of organizing things into groups or categories based on shared characteristics or features. Classification can be used to organize a wide range of things, including living and non-living organisms, physical objects, and abstract concepts. There are many different ways to classify things, and the specific method used will depend on the purpose of the classification and the characteristics of the things being classified.
For example, scientists use classification to organize living organisms into a hierarchy of groups based on their characteristics. This hierarchy starts with the domain, which is the largest and most inclusive group, and then proceeds through the kingdom, phylum, class, order, family, genus, and species. This system of classification, known as the Linnaean system, is used to give every species a unique scientific name that is recognized internationally.
Classification can also be used in other fields, such as library science, where books and other materials are organized into categories based on their subject matter, and in information technology, where data is organized into categories for easier access and analysis.