Classification
320 - Political science
330 - Economics
333 - Economics of land & energy
600 - Technology
700 - The arts; fine & decorative arts
363 - Other social problems & services
26
000 - Computer science, information & general works
23
620 - Engineering & allied operations
19
380 - Commerce, communications & transportation
16
900 - History & geography
14
551 - Geology, hydrology & meteorology
13
140 - Specific philosophical schools
10
370 - Education
10
610 - Medicine & health
9
658 - General management
6
300 - Social sciences
5
630 - Agriculture & related technologies
5
576 - Genetics & evolution
4
581 - Specific topics in natural history
4
720 - Architecture
4
580 - Plants (Botany)
3
657 - Accounting
3
800 - Literature & rhetoric
3
297 - Islam, Babism & Bahai Faith
2
304 - Factors affecting social behavior
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
530 - Physics
2
100 - Philosophy & psychology
1
170 - Ethics
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
400 - Language
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
650 - Management & auxiliary services
1