Signum
600 - Technology (Applied sciences)
1 899
100 - Philosophy & psychology
106
300 - Social sciences
81
500 - Natural sciences and mathematics
29
000 - Computer science, information, general works
10
700 - The arts
4
200 - Religion
3
900 - History & geography
3
400 - Language
1
800 - Literature (Belles-lettres) and rhetoric
1