Dewey Decimal Classification
	분류법
000	Generalities, Computers, Information	일반, 컴퓨터, 정보
100	Philosophy and psychology	철학, 심리학
200	Religion	종교
300	Social Sciences	사회과학
400	Language	언어
500	Natural Sciences & mathematics	순수과학
600	Technology	기술학
700	Arts	예술
800	Literature	문학
900	Geography & history	지리와역사
The system is made up of ten main classes or categories,
each divided into 10 secondary classes or subcategories,
each having 10 subdivisions of its own.
For example, a book on C++ would be classified under 005.133.
Books on English conversation can be found in the 420s.
Books about  playing chess can be found under 794.1
Where would you find books about your major?