We use the New Classsification Scheme for Chinese Libraries for numbering Chinese books and Dewey Decimal Classification for numbering English and Malaya books. In library, all the books on a particular subject are kept in the same place on the shelves, each subject has its own unique number.

New Classification Scheme for Chinese Libraries
000 Generalities
100 Philosophy
200 Religions
300 Natural Sciences
400 Applied Sciences
500 Social Sciences
600-700 History and Geography
800 Language and Literature
900 Arts

Dewey Decimal Classification
000 Generalities
100 Philosophy & Psychology
200 Religion
300 Social Sciences
400 Language
500 Natural Sciences & Mathematics
600 Technology(Applied Sciences)
700 The Arts
800 Literature & Rhetoric
900 Geography & History