Classification
000 - Computer science, information & general works
300 - Social sciences
330 - Economics
39
320 - Political science
26
900 - History & geography
17
333 - Economics of land & energy
16
600 - Technology
16
700 - The arts; fine & decorative arts
14
100 - Philosophy & psychology
11
380 - Commerce, communications & transportation
11
658 - General management
9
363 - Other social problems & services
8
140 - Specific philosophical schools
7
301 - Sociology & anthropology
7
620 - Engineering & allied operations
6
302 - Social interaction
5
610 - Medicine & health
5
630 - Agriculture & related technologies
5
200 - Religion
4
340 - Law
4
410 - Linguistics
4
800 - Literature & rhetoric
4
001 - Knowledge
3
170 - Ethics
3
304 - Factors affecting social behavior
3
338 - Production
3
370 - Education
3
400 - Language
3
500 - Natural sciences & mathematics
3
780 - Music
3
381 - Commerce
2
581 - Specific topics in natural history
2
720 - Architecture
2
120 - Epistemology, causation & humankind
1
153 - Mental processes & intelligence
1
331 - Labor economics
1
332 - Financial economics
1
510 - Mathematics
1
519 - Probabilities & applied mathematics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
745 - Decorative arts
1
770 - Photography, photographs & computer art
1