Classification

Classification may refer to categorization, the process in which ideas and objects are recognized, differentiated, and understood.

Classification may also refer to:

Mathematics

Statistical classification, identifying to which of a set of categories a new observation belongs, on the basis of a training set of data
Mathematical classification, a collection of sets which can be unambiguously defined by a property that all its members share
Classification theorems in mathematics
Attribute-value system, a basic knowledge representation framework

Document classification, a problem in library science, information science and computer science
- Library classification, system of coding, assorting and organizing library materials according to their subject
- Classified information, sensitive information to which access is restricted by law or regulation to particular classes of people
Motion picture rating system, for film classification
Classification (literature), a figure of speech linking a proper noun to a common noun using the or other articles

Standard Industrial Classification, economic activities
Classification in machine learning, supervised learning
Civil service classification, personnel grades in government
Classification society, a non-governmental organization that establishes and maintains technical standards for the construction and operation of ships and offshore structures
Product classification
Locomotive classification
Classification of wine
An industrial Process such as mechanical screening for sorting materials by size, shape, and density, etc