Classification
620 - Engineering & allied operations
600 - Technology
117
363 - Other social problems & services
52
630 - Agriculture & related technologies
45
900 - History & geography
41
380 - Commerce, communications & transportation
31
333 - Economics of land & energy
24
700 - The arts; fine & decorative arts
23
330 - Economics
20
540 - Chemistry & allied sciences
20
140 - Specific philosophical schools
19
720 - Architecture
19
300 - Social sciences
16
000 - Computer science, information & general works
14
500 - Natural sciences & mathematics
14
320 - Political science
13
551 - Geology, hydrology & meteorology
13
530 - Physics
10
610 - Medicine & health
9
100 - Philosophy & psychology
6
581 - Specific topics in natural history
6
590 - Animals (Zoology)
6
800 - Literature & rhetoric
6
580 - Plants (Botany)
5
340 - Law
4
400 - Language
4
301 - Sociology & anthropology
3
410 - Linguistics
3
200 - Religion
2
520 - Astronomy & allied sciences
2
550 - Earth sciences
2
576 - Genetics & evolution
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
364 - Criminology
1
780 - Music
1