Classification
330 - Economics
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
33
333 - Economics of land & energy
32
363 - Other social problems & services
29
140 - Specific philosophical schools
28
600 - Technology
26
000 - Computer science, information & general works
25
370 - Education
15
658 - General management
13
900 - History & geography
13
320 - Political science
11
551 - Geology, hydrology & meteorology
10
340 - Law
9
620 - Engineering & allied operations
9
720 - Architecture
9
576 - Genetics & evolution
7
304 - Factors affecting social behavior
6
800 - Literature & rhetoric
6
400 - Language
5
580 - Plants (Botany)
5
500 - Natural sciences & mathematics
4
200 - Religion
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
300 - Social sciences
2
361 - Social problems & social welfare in general
2
410 - Linguistics
2
414 - Phonology & phonetics
2
540 - Chemistry & allied sciences
2
100 - Philosophy & psychology
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
550 - Earth sciences
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1
780 - Music
1