Classification
300 - Social sciences
320 - Political science
380 - Commerce, communications & transportation
330 - Economics
26
900 - History & geography
17
600 - Technology
16
000 - Computer science, information & general works
11
340 - Law
10
700 - The arts; fine & decorative arts
10
301 - Sociology & anthropology
9
370 - Education
9
100 - Philosophy & psychology
8
333 - Economics of land & energy
8
363 - Other social problems & services
8
620 - Engineering & allied operations
7
400 - Language
6
140 - Specific philosophical schools
5
170 - Ethics
5
200 - Religion
5
610 - Medicine & health
4
500 - Natural sciences & mathematics
3
780 - Music
3
304 - Factors affecting social behavior
2
410 - Linguistics
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
658 - General management
2
720 - Architecture
2
800 - Literature & rhetoric
2
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
650 - Management & auxiliary services
1
657 - Accounting
1
791 - Public performances
1
920 - Biography, genealogy & insignia
1