Classification
900 - History & geography
11
370 - Education
7
361 - Social problems & social welfare in general
6
610 - Medicine & health
6
300 - Social sciences
5
330 - Economics
5
360 - Social problems & services; associations
5
320 - Political science
4
363 - Other social problems & services
4
700 - The arts; fine & decorative arts
4
398 - Folklore
3
301 - Sociology & anthropology
2
350 - Public administration & military science
2
657 - Accounting
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
170 - Ethics
1
333 - Economics of land & energy
1
400 - Language
1
410 - Linguistics
1
600 - Technology
1