Classification
600 - Technology
330 - Economics
36
610 - Medicine & health
26
320 - Political science
14
333 - Economics of land & energy
14
620 - Engineering & allied operations
13
363 - Other social problems & services
11
370 - Education
10
900 - History & geography
10
304 - Factors affecting social behavior
8
700 - The arts; fine & decorative arts
7
380 - Commerce, communications & transportation
5
140 - Specific philosophical schools
3
340 - Law
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
000 - Computer science, information & general works
2
170 - Ethics
2
580 - Plants (Botany)
2
590 - Animals (Zoology)
2
630 - Agriculture & related technologies
2
005 - Computer programming, programs & data
1
300 - Social sciences
1
301 - Sociology & anthropology
1
332 - Financial economics
1
346 - Private law
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
500 - Natural sciences & mathematics
1
530 - Physics
1
576 - Genetics & evolution
1
720 - Architecture
1
780 - Music
1