名詞 categorization:

1. a group of people or things arranged by class or category
   同義詞：classification, categorisation
2. the basic cognitive process of arranging into classes or categories
   同義詞：classification, categorisation, sorting
3. the act of distributing things into classes or categories of the same type
   同義詞：categorisation, classification, compartmentalization, compartmentalisation, assortment