Classification
330 - Economics
320 - Political science
25
000 - Computer science, information & general works
23
900 - History & geography
22
363 - Other social problems & services
21
700 - The arts; fine & decorative arts
17
333 - Economics of land & energy
16
551 - Geology, hydrology & meteorology
16
380 - Commerce, communications & transportation
14
610 - Medicine & health
14
600 - Technology
12
580 - Plants (Botany)
10
630 - Agriculture & related technologies
9
140 - Specific philosophical schools
8
581 - Specific topics in natural history
6
620 - Engineering & allied operations
6
720 - Architecture
6
200 - Religion
4
658 - General management
4
800 - Literature & rhetoric
3
300 - Social sciences
2
340 - Law
2
370 - Education
2
414 - Phonology & phonetics
2
520 - Astronomy & allied sciences
2
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
400 - Language
1
576 - Genetics & evolution
1
590 - Animals (Zoology)
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1