Classification
380 - Commerce, communications & transportation
610 - Medicine & health
26
000 - Computer science, information & general works
21
700 - The arts; fine & decorative arts
21
140 - Specific philosophical schools
20
333 - Economics of land & energy
15
370 - Education
15
363 - Other social problems & services
13
600 - Technology
13
330 - Economics
9
320 - Political science
7
400 - Language
6
658 - General management
6
100 - Philosophy & psychology
5
576 - Genetics & evolution
5
304 - Factors affecting social behavior
4
361 - Social problems & social welfare in general
4
800 - Literature & rhetoric
4
200 - Religion
3
410 - Linguistics
3
580 - Plants (Botany)
3
581 - Specific topics in natural history
3
331 - Labor economics
2
384 - Communications; telecommunication
2
414 - Phonology & phonetics
2
620 - Engineering & allied operations
2
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
340 - Law
1
381 - Commerce
1
551 - Geology, hydrology & meteorology
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
657 - Accounting
1
720 - Architecture
1
780 - Music
1