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Classification systems by subject
Astronomical classification systems
Character classes
Chemical classification
Classes of angels
Classes of computers
Classification of Minerals
Classification of people
Climate and weather classification systems
Complexity classes
Parasports classifications
Educational classification systems
Employment classifications
Flynn's taxonomy
Geographic classifications
Kitesurfing by class
Language classification
Mathematical classification systems
Media content ratings systems
Medical classification
Music classification
Patent classifications
Programming language classification
Rail transport classification systems
Religious types
Sailing by class
Sailing classes
Scientific classification
Soil classification
Sports league systems
Statistical classification
Trade and industrial classification systems
Travel classes
Vehicle classification
Weight classes
Windsurfing disciplines
Wine classification
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