Classification
300 - Social sciences
330 - Economics
600 - Technology
700 - The arts; fine & decorative arts
320 - Political science
13
620 - Engineering & allied operations
12
900 - History & geography
10
333 - Economics of land & energy
9
100 - Philosophy & psychology
8
630 - Agriculture & related technologies
8
363 - Other social problems & services
7
000 - Computer science, information & general works
6
370 - Education
6
140 - Specific philosophical schools
5
301 - Sociology & anthropology
5
380 - Commerce, communications & transportation
5
780 - Music
5
400 - Language
4
530 - Physics
3
610 - Medicine & health
3
658 - General management
3
720 - Architecture
3
340 - Law
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
576 - Genetics & evolution
2
770 - Photography, photographs & computer art
2
200 - Religion
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
551 - Geology, hydrology & meteorology
1
650 - Management & auxiliary services
1
657 - Accounting
1