Classification
300 - Social sciences
330 - Economics
600 - Technology
320 - Political science
27
700 - The arts; fine & decorative arts
20
620 - Engineering & allied operations
19
900 - History & geography
19
333 - Economics of land & energy
16
100 - Philosophy & psychology
15
370 - Education
15
363 - Other social problems & services
14
380 - Commerce, communications & transportation
12
000 - Computer science, information & general works
11
301 - Sociology & anthropology
10
140 - Specific philosophical schools
9
610 - Medicine & health
9
630 - Agriculture & related technologies
9
340 - Law
7
400 - Language
7
780 - Music
7
576 - Genetics & evolution
5
200 - Religion
4
530 - Physics
4
350 - Public administration & military science
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
658 - General management
3
720 - Architecture
3
170 - Ethics
2
304 - Factors affecting social behavior
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
770 - Photography, photographs & computer art
2
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
650 - Management & auxiliary services
1
657 - Accounting
1