Шифр
300 - Social sciences
239
600 - Technology (Applied sciences)
115
800 - Literature (Belles-lettres) and rhetoric
90
900 - History & geography
75
400 - Language
68
500 - Natural sciences and mathematics
55
700 - The arts
40
000 - Computer science, information, general works
21
100 - Philosophy & psychology
21
200 - Religion
18