Classification
320 - Political science
330 - Economics
73
700 - The arts; fine & decorative arts
67
900 - History & geography
55
000 - Computer science, information & general works
50
333 - Economics of land & energy
44
363 - Other social problems & services
38
380 - Commerce, communications & transportation
34
600 - Technology
34
610 - Medicine & health
27
140 - Specific philosophical schools
25
300 - Social sciences
25
551 - Geology, hydrology & meteorology
21
620 - Engineering & allied operations
20
340 - Law
17
100 - Philosophy & psychology
16
576 - Genetics & evolution
14
200 - Religion
12
370 - Education
10
500 - Natural sciences & mathematics
10
720 - Architecture
10
581 - Specific topics in natural history
9
170 - Ethics
8
410 - Linguistics
7
800 - Literature & rhetoric
7
304 - Factors affecting social behavior
6
361 - Social problems & social welfare in general
6
658 - General management
6
400 - Language
5
414 - Phonology & phonetics
5
630 - Agriculture & related technologies
5
520 - Astronomy & allied sciences
4
580 - Plants (Botany)
4
297 - Islam, Babism & Bahai Faith
3
530 - Physics
3
540 - Chemistry & allied sciences
3
780 - Music
3
301 - Sociology & anthropology
2
550 - Earth sciences
2
657 - Accounting
1